Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a9d87d33e12a9a8…

MALICIOUS

PDF

84.3 KB Created: 2021-03-21 10:05:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: bc8409439599978b5c521fcb772b8e3b SHA-1: 4f97979079b41b7508d98ee6d4d1062c00eb187b SHA-256: 0a9d87d33e12a9a81a0249e5dba1ff3ecac0da0e207f80ebafba917e98034a59
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or SEO manipulation tactic. The primary URL, 'https://bologen.ru/award?keyword=baruch+spinoza+dios+pdf', is likely intended to lure victims to a malicious site. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious intent, possibly involving JavaScript for exploitation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://bologen.ru/award?keyword=baruch+spinoza+dios+pdf PDF link annotation
    • https://logugutixolug.weebly.com/uploads/1/3/5/3/135393325/8064039.pdfIn PDF document text
    • https://fezagexagowib.weebly.com/uploads/1/3/5/3/135313062/53dd9a517d8491b.pdfIn PDF document text
    • https://pimipile.weebly.com/uploads/1/3/4/8/134883166/c986391b08500ce.pdfIn PDF document text
    • https://pomisefinare.weebly.com/uploads/1/3/4/9/134902228/5764383.pdfIn PDF document text
    • https://xuwekakef.weebly.com/uploads/1/3/1/8/131856316/suwatisegan-mononepimo-jofoka-gunobota.pdfIn PDF document text
    • https://zetakopazo.weebly.com/uploads/1/3/5/3/135351561/dosalep.pdfIn PDF document text
    • https://xevefozivoro.weebly.com/uploads/1/3/5/3/135339272/8303359.pdfIn PDF document text
    • https://dimulawi.weebly.com/uploads/1/3/4/3/134380670/5432bedb3a.pdfIn PDF document text
    • https://cdn.sqhk.co/xosaletozobi/Ajdijia/9105834549.pdfIn PDF document text
    • https://cdn.sqhk.co/zodozane/ozgdYge/19254737466.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://uploads.strikinglycdn.com/files/773cae2d-4519-45e8-891f-2ce99561d23b/difference_between_arteries_veins_and_capillaries.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/book_layout_template_indesign.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d9413fc-353f-4365-bc7f-ab195e5aa019/powerbeats2_wireless_reset.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/teaching_methods_for_adults.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c695b215-5de4-4dc0-a044-0535eb861628/95985089419.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73c33157-a60a-4e1b-bbe0-62cf90167f65/how_to_learn_angularjs_6_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/zoxewudunigus/bukupibogexepik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5da0942f-1409-4577-ac9d-d1a92b29286e/gaxepotisifalidulaxef.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_off0000fc93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC93 4996 bytes
SHA-256: a1ff72cccfbaa4d6abe05202b2f5712051bd6b1ebde423d91a30f438107a0836
font_01_sfnt_off00010d82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D82 12596 bytes
SHA-256: d2f0191722cb0d0f45d76ef97f0e096d0173dd8e51787dea219291529af5469b
font_02_sfnt_off00013483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13483 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378