Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa13ff599c769076…

MALICIOUS

PDF

98.5 KB Created: 2021-07-23 16:19:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 47536d00cef0cb42e31a616bf3b4524d SHA-1: 81fdab1130b20bc1e2d2a5e7f28df28cfa8185f1 SHA-256: fa13ff599c7690764f7300422a38747e8354a36d98fd588dacbe0cdf6a286e8c
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was detected as malicious by ClamAV and a machine learning classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm on compromised CMS uploads and a brand impersonation lure, specifically mentioning Apple and a call-to-action link. The embedded URLs suggest the document is designed to redirect users to malicious sites, likely for credential phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=how+to+reset+kenwood+dpx502bt.
  • 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 http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160830ac8eca11---24303969370.pdf In PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/26f9a6775e10cef802b8468f4a1c4c5e/vibarobeniv.pdfIn PDF document text
    • http://tgtech-auto.com/userfiles/file/sinuwimiwevevibemopifid.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1ed00122a---63890453004.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/0968efb0d4bc0f3ba869a7300f247999/jipagaruvuzoli.pdfIn PDF document text
    • http://caphegiabao.com/upload/fck/file/korazarogojevetepiraninen.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16070475b88351---84408835293.pdfIn PDF document text
    • https://cape-electronics.com/media/file/lunigorosabusotezanusog.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c525829bd7f---92482789221.pdfIn PDF document text
    • http://perlawarmii.pl/userfiles/file/puziti.pdfIn PDF document text
    • http://mg001.cn/upload_fck/file/2021-7-7/20210707200638693353.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/tiboj.pdfIn PDF document text
    • http://zerosquareonline.com/file/wepefinadolewowidijusesuf.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1608957247615c---4363331474.pdfIn PDF document text
    • https://asharfilalkulfi.com/ckfinder/userfiles/files/bixefilifipoduva.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/69887842829.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160ac30018a9c9---17686896213.pdfIn PDF document text
    • https://kaptenhoki.info/contents//files/kikedonobe.pdfIn PDF document text
    • http://aprendanow.com/wp-content/plugins/super-forms/uploads/php/files/91a4f4e75282510a3c421ca158c076b0/zexijonuvunogaraloxur.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/6fc8200ad1d8ffa010b80aac355dd2ad/xudopoka.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/9b04290055d9d530e9bfb28165fda924/mivilovogosogud.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090f0b2d6dae---70089507541.pdfIn PDF document text
    • http://petra-dario.info/upload/datoteke/bativatuzodudoxofafafatu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=how+to+reset+kenwood+dpx502btPDF 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_off00011d6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D6D 17148 bytes
SHA-256: e601a338e045c1cfc116f9e2b79746ce8e7c42cca0f5ee94815af364513e3c14
font_01_sfnt_off00014a53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A53 10872 bytes
SHA-256: 5e062e3b170b9d59fefee1fcdcba0f0584aa72c8c86fc725c52338368df8fdd3
font_02_sfnt_off0001637a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1637A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1