Malicious PDF — malware analysis report

Static analysis result for SHA-256 efe96ea1c2e392e0…

MALICIOUS

PDF

93.7 KB Created: 2021-03-04 10:02:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 887c9c07dad09932a9c3b1a207a4e7d0 SHA-1: 26e0cc42d593e233cc3df985c83b74374defe82a SHA-256: efe96ea1c2e392e0eb8b12d94c33d02f6b2ed41331e9aaa2ae9ca6dd3d712d44
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via these links. No scripts were extracted, but the sheer volume of outbound links is highly suspicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://fokemale.ru/strik?utm_term=that+time+i+got+reincarnated+as+a+slime+light+novel+volume+12+pdf PDF link annotation
    • http://ganedoxumizaj.sportsontheweb.net/vivofit_jr_2_spider_man_red_band.pdfIn PDF document text
    • http://tokepubex.getenjoyment.net/is_developmental_delay_a_disability_under_idea.pdfIn PDF document text
    • https://pinozawekik.weebly.com/uploads/1/3/4/5/134589254/4627710.pdfIn PDF document text
    • https://kabuvegezukab.weebly.com/uploads/1/3/5/3/135325093/dijemomobe.pdfIn PDF document text
    • https://gepogujewo.weebly.com/uploads/1/3/1/3/131382217/47028c7353ffe1d.pdfIn PDF document text
    • http://tikovg.xyz/arithmetic_logic_unit53r1m.pdfIn PDF document text
    • https://zaniwobomivefo.weebly.com/uploads/1/3/1/4/131406480/dibaxofele.pdfIn PDF document text
    • https://pigulanofalo.weebly.com/uploads/1/3/1/4/131406379/817808.pdfIn PDF document text
    • https://dolilufaxeni.weebly.com/uploads/1/3/2/6/132683246/towuxiraloga_fipavamipikog_kowivevewated.pdfIn PDF document text
    • https://revafabeku.weebly.com/uploads/1/3/4/7/134708131/venixijububenipexi.pdfIn PDF document text
    • https://zesakexe.weebly.com/uploads/1/3/5/3/135314388/797445.pdfIn PDF document text
    • http://fanisore.sportsontheweb.net/platicas_prebautismales_cuauhtemoc_chihuahua.pdfIn PDF document text
    • https://lozezuxugi.weebly.com/uploads/1/3/4/0/134016676/2111128.pdfIn PDF document text
    • https://cdn.sqhk.co/putuziboki/hYifjj3/97653353359.pdfIn PDF document text
    • http://beautysss.site/carry_on_bag_size_limit_emirates3kzlp.pdfIn PDF document text
    • http://kopalirigel.mypressonline.com/2018_dodge_ram_1500_accessories_canada.pdfIn PDF document text
    • http://vknacruckalaikov123.xyz/54308906908tjlbk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/putelekireza/bobolibenukokukusames.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_off00010e4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E4C 9240 bytes
SHA-256: fced5aa5db9fad5759ae3a30f5badc7400053a0133a6f03a4b8ad275fe694650
font_01_sfnt_off00012cf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF7 5764 bytes
SHA-256: d8a242db67ad61f0633e156da62fe3480cea036b84c8d6ad32cb57ed93582157
font_02_sfnt_off0001407d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1407D 11896 bytes
SHA-256: 8b4c2fd1fac59a1d08ef77ae25cad223c6c04984e131ab306e1206b8e6b3e71b

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