Malicious PDF — malware analysis report

Static analysis result for SHA-256 127d721daaec396e…

MALICIOUS

PDF

93.5 KB Created: 2021-09-02 01:59:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: bf0ef9adaca099446579d48ba763b3b4 SHA-1: 35094c531832eccf07938109eeb7ae3f7a5083dd SHA-256: 127d721daaec396efef72d7903cbfaf0469470a274b5a34e1cbb36dbdfc8a2db
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics suggest it functions as a link farm, potentially leading to phishing or scam content, and includes callback lures. While no scripts were explicitly extracted, the PDF structure and associated URLs point towards a phishing or social engineering attack vector, likely involving the download of further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9495f74e91---falowikoronira.pdf In PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/78m18jq3mo6mt9pia5cnkmm5b4/62723659738.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/5664f97da161a8f85c7e458e77dbe7ad/gezadibuderifetaviziju.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/a199b2819ef9d45478b5ace527620403/lubewodefowajuxakevawutig.pdfIn PDF document text
    • http://tcsm62.org/uploads/news/file/13325810701.pdfIn PDF document text
    • http://avandcie-automation.com/ckfinder/userfiles/files/51110277981.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/vivadanuletotumutekaroxek.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160e6388939d0f---vasogukedi.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/p4npnkhrbkmrt272n9oibohchf/zokiwonujagaxurujoluv.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd2657a51c---40970429227.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608798e52006b---60476913216.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad24c915c58---5436909073.pdfIn PDF document text
    • http://casier-a-bouteilles.com/file/80733456479.pdfIn PDF document text
    • https://canevastoilestjean.com/upload/editor/file/kixog.pdfIn PDF document text
    • https://nevisnews.com/userfiles/56240437040.pdfIn PDF document text
    • http://cuanhomkinhtoanthang.com/media/file/34693326153.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086efeceee4a---91852367531.pdfIn PDF document text
    • http://minhledtran.com/luutru/files/22435156974.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/g9p0sp6tml8dc29819ubbek875/83802266296.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/79236344674.pdfIn PDF document text
    • http://duetsepolno.pl/userfiles/file/bewoxudijipor.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/a149836cc8170b2fcfcd2e4c9f6c02a7/69682530626.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607341f912c89---74292205353.pdfIn PDF document text
    • http://janjoling.com/public/ckfinder/userfiles/files/gaguguv.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/l0d1m0m69erru6k5ntcfi4ls54/kogagiretelid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=garbage+can+be+reused+byPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106AC 10584 bytes
SHA-256: 01f3910b577e3eeca54f4076a3e2f67679547bd39730766f5e6e983e1fd5571a
font_01_sfnt_off00011ecc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ECC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000136de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136DE 18920 bytes
SHA-256: 29e6195f49a82aa1a59e1b7e41011d24f482dfba068496b9b10c2f4531c52a14

Open this report in the interactive analyzer, or submit your own file for analysis.