Malicious PDF — malware analysis report

Static analysis result for SHA-256 13d49940019bcef0…

MALICIOUS

PDF

121.6 KB Created: 2021-05-12 02:03:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: fffef8a5f48cd915159fc124e63b5c63 SHA-1: de94b096038e61256c8675a495cf40022908aa6e SHA-256: 13d49940019bcef045bd29594ef7898131000648f21077d743aa04704b1d48b1
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 0.9992

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://gimoguvi.ru/strik?utm_term=what+are+the+two+main+sources+of+carbon+dioxide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4489843/normal_6000cd15bd75d.pdfIn PDF document text
    • https://cdn.sqhk.co/laxuweredex/cWggCmz/capturing_reality_free.pdfIn PDF document text
    • https://cdn.sqhk.co/nopawuwam/5MIEugh/skateboard_tricks_to_learn_after_kickflip.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376856/normal_5fcbe32565959.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459917/normal_6069ead0204b4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496204/normal_5fc80bf5da085.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366647/normal_601604b0d4592.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368970/normal_602d610516aec.pdfIn PDF document text
    • http://zapitexidij.mypressonline.com/56868521260.pdfIn PDF document text
    • https://cdn.sqhk.co/wotirixa/jahj2hf/stickman_and_shotgun_3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422373/normal_5fed7291803c8.pdfIn PDF document text
    • https://cdn.sqhk.co/xanovixewin/kNhaXhc/download_the_king_of_fighters_98_the_slugfest.pdfIn PDF document text
    • http://netewe9.xyz/rewobafetorewozaxobopixt8wuc.pdfIn PDF document text
    • http://ukrdomonis.xyz/sixajunir5dsu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476152/normal_60031a33b2158.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483604/normal_600479caa7e37.pdfIn PDF document text
    • http://helplnstagramcontact6088756.com/37890424964e3cjc.pdfIn PDF document text
    • http://pikegupima.medianewsonline.com/test_de_raven_completo.pdfIn PDF document text
    • https://cdn.sqhk.co/jidulopavoji/Ute2ggd/latest_liverpool_fc_transfer_news_now.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420764/normal_60359bee1f30b.pdfIn PDF document text
    • http://djami.ru/birches_poem_analysisgyg0d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ccd4a2e6-63e2-4dcb-a02e-1ae1253dabcc.filesusr.com/ugd/059ff1_912365fb22f04545902be83fc73121b6.pdf?index=trueIn PDF document text
    • http://sipanokule.onlinewebshop.net/wuxid.pdfIn PDF document text
    • https://19d8af67-ac20-4a7c-8ffd-69be953788a8.filesusr.com/ugd/578741_bc11552c3c104255b301a74df947b7e3.pdf?index=trueIn 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_off00019973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19973 5540 bytes
SHA-256: 49218a6fb84125178ee94911869bd5ef29e47903d8f63c207f382946642ff7d9
font_01_sfnt_off0001ac3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AC3F 13464 bytes
SHA-256: 226065d56a7c724b70da1b5b5a937137739e46a6b02560d7ed02b7771d8ba00a

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