Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad9ac3774c1d6642…

MALICIOUS

PDF

75.4 KB Created: 2020-11-22 05:01:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2d5f48c288858d2dc816f6a0311fb965 SHA-1: 9d963d63cf4c51f809f2042580a6c97db2c7148a SHA-256: ad9ac3774c1d66421fbdfddb13eb059aaa8a2c65b8ea7d5f456e4b23020b9e10
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffking.ru/123?utm_term=jason+dandruff+shampoo PDF link annotation
    • https://jimivisimobud.weebly.com/uploads/1/3/4/9/134901817/vozobizopopibesalipi.pdfIn PDF document text
    • https://xobowosesij.weebly.com/uploads/1/3/4/6/134616182/1fc2010b.pdfIn PDF document text
    • https://tazejoga.weebly.com/uploads/1/3/1/3/131383942/bb29deb28.pdfIn PDF document text
    • https://zolagefotatol.weebly.com/uploads/1/3/4/7/134709454/7084327.pdfIn PDF document text
    • https://tanezogifa.weebly.com/uploads/1/3/4/3/134321065/5510834.pdfIn PDF document text
    • https://zusadadej.weebly.com/uploads/1/3/4/8/134856209/e2c5f.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/kojurufilufopimob.pdfIn PDF document text
    • https://gubaxefu.weebly.com/uploads/1/3/4/5/134592394/fd909d1868f38fd.pdfIn PDF document text
    • https://dokodajibebabek.weebly.com/uploads/1/3/2/3/132302773/51cf09cde3eb3b4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zuponefi/44554285757.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/kite_runner_foil_characters.pdfIn PDF document text
    • https://s3.amazonaws.com/gebaxovudofe/61028004671.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/acute_ankle_sprain_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/latest_movies_app_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/keto_360_meal_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/calendar_2019_20.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB9 4876 bytes
SHA-256: 54ff37d1a4288013e4b2883efbd2a6f57990f2c7e895af07340159c92bb26848
font_01_sfnt_off0000ecfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECFD 11248 bytes
SHA-256: 8d3de35bab5bb321f8225fccb26e460591d99d27277dd3867ae65533bac30ced
font_02_sfnt_off00011248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11248 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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