Malicious PDF — malware analysis report

Static analysis result for SHA-256 944004ba7022dbf3…

MALICIOUS

PDF

85.2 KB Created: 2021-05-09 22:08:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: ce46e2372bb95826033dc627cc13d754 SHA-1: 157f070fd42cc8fb41aba4ed50333a83104c3d20 SHA-256: 944004ba7022dbf3d79173bfcd5d08f75e5d9d224b0f051dd181ddaa9ecf26c4
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, references 'How to setup jabra wireless headset', serving as a lure to direct users to the malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://midufefew.ru/strik?utm_term=how+to+setup+jabra+wireless+headset PDF link annotation
    • http://cmbclientes.com/how_to_make_your_first_million_warren_ingrameteo5.pdfIn PDF document text
    • http://leoidet.xyz/tiforisefaxonerazavasiwj2l6.pdfIn PDF document text
    • http://ndfnasg.xyz/prenuptial_agreement_australia_templatetpp9a.pdfIn PDF document text
    • https://jedopebo.weebly.com/uploads/1/3/4/8/134889916/kenaxijofajojufuj.pdfIn PDF document text
    • http://tifusavegapawuf.mygamesonline.org/jenepomox.pdfIn PDF document text
    • http://naligixe.getenjoyment.net/the_believer_s_authority_andrew_wommack.pdfIn PDF document text
    • http://smartradiobf.ru/308395791819v7nt.pdfIn PDF document text
    • http://shopyou.online/73114142538mvzul.pdfIn PDF document text
    • https://pufukowog.weebly.com/uploads/1/3/4/5/134583281/4257094.pdfIn PDF document text
    • http://erethiztzj.space/rick_hanson_buddhas_brain_reviewmkor3.pdfIn PDF document text
    • http://wanezus.scienceontheweb.net/62673514274.pdfIn PDF document text
    • http://swiss-gear.store/ubuntu_bootable_dvd_isojns0i.pdfIn PDF document text
    • http://zozavelomidabi.scienceontheweb.net/wrangler_jk_service_manual.pdfIn PDF document text
    • http://snapchat-alert.com/dumiputasegijivjrtpy.pdfIn PDF document text
    • https://gubagomokugexat.weebly.com/uploads/1/3/3/9/133988684/20213529.pdfIn PDF document text
    • http://rezotu.xyz/perfect_gears_chennai_pvt_ltd3mazq.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://uploads.strikinglycdn.com/files/b1e061c5-ff93-4cf4-b793-4df2e3f9ed60/stealth_camper_vans_for_sale_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef73b9d8-5f22-42d2-bdd4-482d196c1f0c/application_for_clean_air_vehicle_decals.pdfIn PDF document text
    • https://3fb740b9-71d8-4183-8edb-de11b68c0a29.filesusr.com/ugd/1fbf8b_04b50c944521472e83e911627c52687e.pdf?index=trueIn PDF document text
    • https://29474179-7c7c-44ae-84e0-3c37792f2e25.filesusr.com/ugd/7f817d_c0d0102f224a44d59a84a46bad5b8603.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10012 5092 bytes
SHA-256: ec7304b1911500d9ea17610d318f4f0f7a47dd7ffa2247e9dd7ea5e492683228
font_01_sfnt_off0001117c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1117C 11664 bytes
SHA-256: 360f97eefb30a137293cadeb54dab8c16d7ebb4b495a2ae573271356ab0abbd9
font_02_sfnt_off00013939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13939 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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