Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f49397a7ac1d688…

MALICIOUS

PDF

88.1 KB Created: 2021-09-17 21:28:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b5672e75b8fe4ce57df922180d6449e4 SHA-1: 8e3a0843ac4e566021e2bdaf8718644ae068757c SHA-256: 6f49397a7ac1d68878d303078332809779ff0c5ac810594a506e90076c049a81
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external URIs and is identified as a link farm, with several links pointing to compromised WordPress upload storage. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • 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.
  • 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 https://allytemp.ru/uplcv?utm_term=watch+one+piece+stampede+full+movie PDF link annotation
    • http://puntolinea.org/userfiles/files/60197323584.pdfIn PDF document text
    • https://myparrotfood.com/user_files/files/sisavuvapipefaku.pdfIn PDF document text
    • https://pragatitic.org/ckfinder/userfiles/files/84374654612.pdfIn PDF document text
    • http://puebloexec.com/userfiles/file/68612799370.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132de399d0dd---rokasixezapalukogopusen.pdfIn PDF document text
    • https://malinaionescu.ro/userfiles/file/wipesufetoteg.pdfIn PDF document text
    • https://menu2uplus.com/images/file/rogofitebi.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/bd3e0893d05610933529dd0ff5fc6ee5/44928139815.pdfIn PDF document text
    • https://benhgout.net/uploads/Files/file/golomikudijemob.pdfIn PDF document text
    • https://burstallconrad.com/editor_files/file/dakebogirusoxulemesusi.pdfIn PDF document text
    • http://angelsolutions.ro/ckeditor/ckfinder/userfiles/files/toxibejisukujola.pdfIn PDF document text
    • http://naturpix.ch/cmsimages/file/sefokukexogu.pdfIn PDF document text
    • https://ms02bet.com/contents/files/toranej.pdfIn PDF document text
    • http://sayarbobinaj.com/file/ribavodune.pdfIn PDF document text
    • http://atmaircenter.com/lb/userfiles/files/2506433233.pdfIn PDF document text
    • https://debo-fit.be/userfiles/file///refalakitebovibofafek.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b4399feddf554b3e98014bac8f0fad11/setadasufujexok.pdfIn PDF document text
    • http://vector-luczak.pl/new/fck_user_files/file/2828466533.pdfIn PDF document text
    • http://gachmenminhchien.com/media/ftp/file/suwafudezu.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16142b27ceacae---ribumokavekivotevixoj.pdfIn PDF document text
    • http://klubbelgickychobrov.sk/editor_uploads/files/41843052225.pdfIn PDF document text
    • http://wirtrauenuns.ch/images/file/tekixo.pdfIn PDF document text
    • 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_off0000f4d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D2 17596 bytes
SHA-256: b6287f15a8a5e1dea867088401dc8056e821b9af35b045b449d73f8118744151
font_01_sfnt_off00012209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12209 10944 bytes
SHA-256: 937ed5ea067293dbac2b9995760fb3a25518936539106e4aa77c9733dae94af0
font_02_sfnt_off00013b3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B3C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1