Malicious PDF — malware analysis report

Static analysis result for SHA-256 0557be94aa34ebbd…

MALICIOUS

PDF

72.7 KB Created: 2021-09-14 03:31:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: bb116ffaaa0136b801e0e0bb93a4bc35 SHA-1: e81e207a189f12c113f1a1c300201ac124e27597 SHA-256: 0557be94aa34ebbd98cdae8290bbf0525a602b89cbdece8a861bfb266b21feb3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lrm.mcdonalds.ua/ckfinder/userfiles/files/48731130462.pdf In PDF document text
    • http://kirilmazbardak.com/userfiles/file/zomaliwerimifefogi.pdfIn PDF document text
    • http://areopag-group.ru/sites/default/files/uploads/domapa.pdfIn PDF document text
    • http://grupafurman.pl/!mag2011/userfiles/file/bizosepavowenefumib.pdfIn PDF document text
    • https://pasationtravellers.com/root/FCKeditor/file/863065436.pdfIn PDF document text
    • https://sitarasign.ir/data/file/xuwenutesewip.pdfIn PDF document text
    • https://thisissati.com/userfiles/files/7387259902.pdfIn PDF document text
    • http://musicpark-live.com/userfiles/file/veveku.pdfIn PDF document text
    • http://evevoyance.fr/adh/.-/file/10192486757.pdfIn PDF document text
    • https://dbmotorbrokers.com/userfiles/file/53131442946.pdfIn PDF document text
    • http://fmafirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/34919525066.pdfIn PDF document text
    • https://webrekruit.com/php_codes/Scott/VieauAssociates/code/userfiles/file/ranatexexadilovuwof.pdfIn PDF document text
    • http://preprod.app-nomads.com/ugecam/admin/ckfinder/userfiles/files/17358241644.pdfIn PDF document text
    • http://fipjp.com/userfiles/file/nopufezosokil.pdfIn PDF document text
    • https://cailux.lu/userfiles/files/gozamiweput.pdfIn PDF document text
    • https://dennismaloney.ca/upload/editor/file/19946403671.pdfIn PDF document text
    • http://carbonelite.ru/file/2721314205.pdfIn PDF document text
    • http://alburigiott.it/userfiles/files/1321500533.pdfIn PDF document text
    • http://roletyhanarol.pl/files/file/nimegaxiboxe.pdfIn PDF document text
    • https://www.truck-transport.com/ckfinder/userfiles/files/zonoj.pdfIn PDF document text
    • https://ruta.hu/ckfinder/userfiles/files/60242743123.pdfIn PDF document text
    • http://xy-interior.com/uploads/files/202109071835208466.pdfIn PDF document text
    • http://nhasachnguyenvancu.com/Images_upload/files/73631948426.pdfIn PDF document text
    • http://sendedianqi.com/upload_fck/file/2021-9-5/20210905185921611242.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=ben+ten+alien+force+apkPDF 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_off0000b6d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6D8 10448 bytes
SHA-256: 68339ffebb3da952be23cf9dac6abe579fd4bf8050ee54c3dc789afb46d72858
font_01_sfnt_off0000ceac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEAC 17968 bytes
SHA-256: 2e1dbe352db601f8ca55e4847583f76fe06887f90a8852f94798a87319d71042
font_02_sfnt_off0000fd85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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