Malicious PDF — malware analysis report

Static analysis result for SHA-256 c108dab7c72c9457…

MALICIOUS

PDF

84.3 KB Created: 2021-02-06 20:04:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 63bdd898a2d90bcf77ed5a3f16533c89 SHA-1: 5b9e93de4f636c56346c1638d2433954673c8e5b SHA-256: c108dab7c72c9457dc39a666f21ded154695242f74268abd7343c0d4c5f2557e
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

Heuristics 5

  • 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.
  • 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/aws?utm_term=fortisandbox+2000e+datasheet PDF link annotation
    • https://cdn.sqhk.co/dikozogub/ebidm5J/gajexudukuba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458417/normal_5fc7f93156204.pdfIn PDF document text
    • http://compte-cmbretagne.best/66963969722lpkhb.pdfIn PDF document text
    • https://cdn.sqhk.co/mifopanikil/qgejf47/motorcycle_racing_gear_store.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386822/normal_5fd3423366771.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410217/normal_5ff1e4696b2f7.pdfIn PDF document text
    • https://ruvezidarumova.weebly.com/uploads/1/3/1/3/131380493/117d60660f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412894/normal_5fd9bd226aec7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447874/normal_5fe03566c9748.pdfIn PDF document text
    • https://cdn.sqhk.co/genopeno/9rcakRz/street_fighter_4_arena_free_download_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/fetedudi/iqMJ8ii/tikuzugukozifadewuvuk.pdfIn PDF document text
    • https://cdn.sqhk.co/ligumorik/jdiimji/ultimate_goal_synonym.pdfIn PDF document text
    • https://cdn.sqhk.co/xusopusavo/igibghC/limbo_prime_neuroptics_price_ps4.pdfIn PDF document text
    • https://boxatikavizag.weebly.com/uploads/1/3/4/6/134680825/0995a.pdfIn PDF document text
    • https://watepiwod.weebly.com/uploads/1/3/2/7/132710700/ea815a2c32a.pdfIn PDF document text
    • http://www.opentle.orgIn 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
    • 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://www.gnu.org/licenses/gpl.htmlIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000ea0c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xEA0C 14340 bytes
SHA-256: 36be627711f4faf178fad67e9744ee55a13407a0ca993846c722400d7aaed825
font_00_sfnt_off0000d8cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8CB 5104 bytes
SHA-256: 62dbbd59645cc6bc87456eac29bf1179e6e1c03404b328c3cf9e36888f2a4789
font_02_sfnt_off0001108a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1108A 10788 bytes
SHA-256: ba231136262183432275dd67e81a86470f5b9a4ff42d3337c11075d1528ee5ad
font_03_sfnt_off00013579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13579 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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