Malicious PDF — malware analysis report

Static analysis result for SHA-256 a38ccc581a36cac9…

MALICIOUS

PDF

43.4 KB Created: 2020-10-07 03:00:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: c95b793c56f6acb338b995823940b49c SHA-1: b7e9a4825e879b7106c91e919b23f361f9b52e1c SHA-256: a38ccc581a36cac93c047371532c3dc1434402a62349258e46ee1aaaa8a3ad80
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a redirector service, which is a common tactic for delivering malicious content. The document body, though obfuscated, contains the target URL and references to a county deeds search, suggesting a phishing or scam lure. The presence of numerous external links further indicates a link farm or redirection strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ttraff.me/pify?keyword=berks+county+deeds In PDF document text
    • http://files.stjamespa.org/uploads/1/3/1/3/131379395/9131566.pdfIn PDF document text
    • http://dedaba.crazymountainforge.com/uploads/1/3/1/4/131407005/surorijiz.pdfIn PDF document text
    • http://kigeled.hectorsshop.com/uploads/1/3/1/3/131379833/fd7a75.pdfIn PDF document text
    • http://files.myfreedomfellowship.com/uploads/1/3/1/3/131380759/sagejiwonutabekagope.pdfIn PDF document text
    • http://files.enidneighborhoods.com/uploads/1/3/0/7/130739633/7449655.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://cdn.shopify.com/s/files/1/0492/7740/3292/files/christmas_claymation_movies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/1843/9834/files/vizio_e601i-a3_weight.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/3771/6391/files/73069933708.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0490/0880/4007/files/patubirelitawik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5582/5567/files/santo_santo_es_el_senor_new_wine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f72f48d3-b272-4dec-8f50-1f25e6e8221f/nekizofiwakepodoxusi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e58f71a-16f0-4859-a9f4-9d18ddfd84a6/getupoluxaluwugogozedubeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a02a0512-d023-4ebe-b3c6-a88c0104fea6/16849861694.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dddcbbb0-443a-42ec-af91-fd19a0f04b27/73963172241.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5645e076-2c11-450f-a0b3-e4b96e93f936/81152409096.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4980eb39-53b9-4581-8642-a6f3f97efd77/dopelixulabidajefa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/007a7f8e-ed20-42aa-94a6-5e333d33f7cf/74701897541.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6272a7ca-de49-4b5f-8986-d844c2be6d9f/57871539292.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_off00005e36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E36 4740 bytes
SHA-256: 8bc5189f8332f9974e6557a1571d46180435601af8a11a80ca5574a06d4bbd5b
font_01_sfnt_off00006e69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E69 10576 bytes
SHA-256: 505df65868c66d9a7bba3e33a1178d4905fffaa716ffee95959d1dd7d4411ea0
font_02_sfnt_off00009234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9234 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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