Malicious PDF — malware analysis report

Static analysis result for SHA-256 2be6bfc8879e7588…

MALICIOUS

PDF

115.9 KB Created: 2021-03-29 13:16:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: efc1ac548a41ee14f0a2048b33d5b621 SHA-1: 084c1d826ba52a8ec543ab653408801f74ea550f SHA-256: 2be6bfc8879e7588dbc346cb68131d998638ad7698ef2c0e22fbf428e46d7253
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, and is flagged as a link farm. The primary URL, 'https://maypoin.ru/award?keyword=adobe+acrobat+x+pro+pdf+to+word', suggests a lure related to PDF conversion tools. While no scripts were explicitly extracted, the heuristic firings strongly indicate a malicious intent to redirect users to potentially harmful content, consistent with phishing or malware distribution campaigns.

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://maypoin.ru/award?keyword=adobe+acrobat+x+pro+pdf+to+word PDF link annotation
    • http://tevubirufizibun.iblogger.org/5494176513.pdfIn PDF document text
    • http://vigetatefix.iblogger.org/morutiwumanojusepelor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414514/normal_603e88e0beab1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451753/normal_6044d96e6cde3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f3874c2d-c116-49c2-b7b6-9300dc8fc43e.filesusr.com/ugd/b11f6d_7aea704fc8ee43f59bda0502b5ff64fe.pdf?index=trueIn PDF document text
    • https://694dae7a-2033-4a59-8b06-91ff4eec0774.filesusr.com/ugd/e1d58f_6fb7c727b3ff4dab999f7693283059a4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/deefb0c3-d3e3-41fb-b215-4d05fbf5797c/twilight_new_moon_book_cover_meaning.pdfIn PDF document text
    • http://noxawobamuxila.epizy.com/88311855930.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94c07b19-a9a8-4940-b9bd-a3ea5f98d242/kabodo.pdfIn PDF document text
    • http://ralewawixofax.epizy.com/90008212036.pdfIn PDF document text
    • http://bideliv.rf.gd/dotesijol.pdfIn PDF document text
    • https://27a83426-c768-4525-a63d-b5b732cca755.filesusr.com/ugd/28b3f7_84431d09fbf643b8ad7a7823a6a53ba1.pdf?index=trueIn PDF document text
    • https://ab2ac9d4-4772-4872-829d-c19fde0a4f90.filesusr.com/ugd/b919b3_b9f06bf5f35a43f2bb0f6fe7bcd5d267.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ed4bf30-b67c-47c4-a8d0-22f087e4a144/the_elephant_vanishes_short_story.pdfIn PDF document text
    • https://36622f5a-5a1b-41a5-aa98-965156e47ac2.filesusr.com/ugd/804ff6_492d2c1625174cef8019f059acab4bfb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7bb42e7-6bde-4d42-8345-1afdf13ed67d/vowupofutakeludorigiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bc27577-9e37-4623-ae74-6877f6467030/10216508889.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12501b3c-cc66-43af-8384-be2eb0a3de96/salejidovozeliposigoxa.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezodepugov/bit_torent._com_free_for_windows_xp.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/ascites_treatment_guidelines_cancer.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_off0000eba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA5 52552 bytes
SHA-256: 353d531710bb9e05800f2816caecdcd56c4647ce34ed31f98c3d4ff3c7655354
font_01_sfnt_off00018956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18956 5228 bytes
SHA-256: 09c97ea469b9a2534b0880b577745c62e7347bab01c43968ab5a4d21c9f380be
font_02_sfnt_off00019b47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19B47 10676 bytes
SHA-256: e6ce9b460f055f33f5ba8106250b42281678db1533cdd50b5aad5f27cdb83ddb