Malicious PDF — malware analysis report

Static analysis result for SHA-256 39c736be26ae2060…

MALICIOUS

PDF

74.3 KB Created: 2021-05-14 01:28:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: aa320cdc200fe9a418e8d59b96c23911 SHA-1: c9d25cfb59a7a1e36e4d1f0d4adf01ad9c01cd81 SHA-256: 39c736be26ae206014f4b2d39376024f56f9df037bf2422ae3888243223c8857
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or redirector strategy. The presence of a UTM-tagged redirector URL indicates a phishing or malware distribution attempt. ClamAV detection and ML classification confirm the malicious nature of the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://lozipotod.ru/strik?utm_term=qsc+touchmix+16+recording PDF link annotation
    • https://babibogek.weebly.com/uploads/1/3/1/3/131379554/8f3eacf00a.pdfIn PDF document text
    • https://vedexojofidas.weebly.com/uploads/1/3/4/5/134581268/fc27369.pdfIn PDF document text
    • https://cdn.sqhk.co/kosadara/g9jeNjd/81552782886.pdfIn PDF document text
    • https://cdn.sqhk.co/soboxuxafiso/cn0Ysge/road_riot_apk_unlimited_money.pdfIn PDF document text
    • https://fepaxumezo.weebly.com/uploads/1/3/4/3/134320712/8728145.pdfIn PDF document text
    • https://tiwibuvemugijaj.weebly.com/uploads/1/3/0/7/130776889/0e5bf7ec1148789.pdfIn PDF document text
    • https://bunupujitoj.weebly.com/uploads/1/3/4/0/134017728/2f1857a693f07fd.pdfIn PDF document text
    • https://cdn.sqhk.co/lomasamube/hiZuJob/tikudenefajerinof.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/how_to_test_irritrol_rain_dial.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/navy_eval_writing_book.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/58572837479.pdfIn PDF document text
    • https://e905a76e-7bc1-418c-be29-e8eda1603e86.filesusr.com/ugd/3fb32a_84dc6a29b122437d896226ff15b8c812.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nademopor/apostrophe_worksheet_answer_key.pdfIn PDF document text
    • https://e0ff2378-281a-4ea3-95ae-419c526fdc99.filesusr.com/ugd/0baf77_c9141e30dde24c308cc7421bff3d7a7f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jijari/2202153032.pdfIn PDF document text
    • https://4a7d9d2b-1d67-446c-8d6d-bdd3043d1f60.filesusr.com/ugd/c3d078_4ba1496a286344e5bdadad5c396f0676.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/birdman_film_parents_guide.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A0 5448 bytes
SHA-256: 408c2ae0784d0ea02b49bdc3545f5110a784aee83931414df4ff7dcd0f1aec14
font_01_sfnt_off0000f406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF406 11464 bytes
SHA-256: f6182f1c11f168e26e536793b367b7dd2c2fe2c6ea90dcac377129821c6034b9

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