Malicious PDF — malware analysis report

Static analysis result for SHA-256 67ee616f93c17374…

MALICIOUS

PDF

35.9 KB Created: 2020-05-14 07:52:22 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-08-25
MD5: 6af327b83aec01aa3de731eaa9b15229 SHA-1: 514a42ce11c876860a90a3d709b4d07918f22c02 SHA-256: 67ee616f93c1737429555e3aa94de5d6a4cb2765a0bd6e2c6e2e506f5c2a8bd8
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were explicitly extracted, the embedded URLs suggest a link farm or redirection scheme, potentially leading to malicious content or phishing pages. The document's content appears to be a lure related to educational worksheets.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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 http://blacksheepoptimists.com/uploads/1/3/0/5/130551754/130551754.html#multiplying+and+dividing+fractions+worksheets+year+6 PDF link annotation
    • http://toxicaircontrol.com/uploads/1/3/0/2/130287984/donodewalakilozafizu.pdfIn PDF document text
    • http://quotesforannuities.com/uploads/1/3/1/4/131454503/joxunakofetenip-saronusozetunop-dogejeja.pdfIn PDF document text
    • http://stereojux.com/uploads/1/3/1/3/131380212/pudoxulebube.pdfIn PDF document text
    • http://passionforfashion2.com/uploads/1/3/0/8/130814010/kufodufa.pdfIn PDF document text
    • http://survivorstothrivers-healingtrauma.com/uploads/1/3/0/4/130436188/vibebeguza.pdfIn PDF document text
    • http://diamondcutpolishedconcrete.com/uploads/1/3/0/3/130313123/vozizagagu_xilufukopu.pdfIn PDF document text
    • http://alluretats.com/uploads/1/3/1/3/131398225/navig.pdfIn PDF document text
    • http://macksirishsealcoat.com/uploads/1/3/1/4/131437210/3675407.pdfIn PDF document text
    • http://atlclimatestrike.org/uploads/1/3/0/5/130588270/e62db.pdfIn PDF document text
    • http://shirtechnologies.com/uploads/1/3/1/3/131398009/92e9237c8a19.pdfIn PDF document text
    • http://resonaisearch.com/uploads/1/3/0/8/130813777/519b8db552.pdfIn PDF document text
    • http://syejohnsonhomeimprovement.com/uploads/1/3/1/3/131380848/rijusazelenavupu.pdfIn PDF document text
    • http://magnoliamusicny.com/uploads/1/3/0/2/130289173/7760661.pdfIn PDF document text
    • http://bperfectgels.net/uploads/1/3/0/6/130604517/6059088.pdfIn PDF document text
    • http://myhoneybeetherapy.org/uploads/1/3/1/4/131452821/lukilod-vatapeliru-tazalep-ragowus.pdfIn PDF document text
    • http://lwmdinc.com/uploads/1/3/0/5/130589159/kogizu_kiwizorofejefu_dalegomuvenazef_fimojolupe.pdfIn PDF document text
    • http://sweetsevencakes.com/uploads/1/3/0/4/130489742/depaxutew-gabizikofoxem-kokowubogek.pdfIn PDF document text
    • http://bigtinyretirement.org/uploads/1/3/0/4/130435546/e25f3326139.pdfIn PDF document text
    • http://boldnfearless.com/uploads/1/3/1/4/131407312/rakireputoda-lisup-xepisixup-netesab.pdfIn PDF document text
    • http://iicforsuccess.org/uploads/1/3/0/7/130776076/dudasakoxug_fivajigip_gugasoxebak.pdfIn PDF document text
    • http://originofdata.com/uploads/1/3/1/6/131636965/vilagazixaf.pdfIn PDF document text
    • http://beyoulovelytoo.com/uploads/1/3/0/6/130605118/kevixofagi-patijudad-vetodo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 1

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF2 9668 bytes
SHA-256: ca88dc99577b7a25de38979cad4e6cb4d415a234e2315dac8f9c7b8ca3989b73

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