Malicious PDF — malware analysis report

Static analysis result for SHA-256 02a413c7d0f3eff7…

MALICIOUS

PDF

73.0 KB Created: 2021-03-29 16:42:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 7e782fbc56877b95117e10fbb9a4519b SHA-1: 9e0ecae7e27e189606454bd4a8a365e7d5825823 SHA-256: 02a413c7d0f3eff709541160f72bc7d8055c8195b2ffea60dde71e520e3f6cc4
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs and the document's structure point towards an attempt to redirect users to potentially malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://druttle.ru/strik?utm_term=can+i+turn+on+my+bose+solo+without+the+remote PDF link annotation
    • https://lijuvimu.weebly.com/uploads/1/3/0/7/130775306/5670244.pdfIn PDF document text
    • https://judadumoxa.weebly.com/uploads/1/3/4/7/134718892/rusubixaramokalur.pdfIn PDF document text
    • http://gorerusuwoto.iblogger.org/vixosotata.pdfIn PDF document text
    • https://sifixiwip.weebly.com/uploads/1/3/4/5/134596292/tovulavuxujejapubune.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412164/normal_60368b02b3a2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369766/normal_5fdb60bb088d7.pdfIn PDF document text
    • https://gatepeduvemixif.weebly.com/uploads/1/3/4/6/134669895/1873138.pdfIn PDF document text
    • https://gokasesebigi.weebly.com/uploads/1/3/3/9/133986942/lapedekanowegek-wokovomusunumax-gavelota-nagulafitedifer.pdfIn PDF document text
    • https://dazuneluxenewag.weebly.com/uploads/1/3/4/3/134316856/5544459.pdfIn PDF document text
    • https://sozatoma.weebly.com/uploads/1/3/4/4/134484551/bukapabul_liritugomiz_dabazivefedi_mumirarelabuk.pdfIn PDF document text
    • https://zawoxabupuw.weebly.com/uploads/1/3/5/9/135990747/3eab5acf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453329/normal_60365006517dd.pdfIn PDF document text
    • http://xesubixuj.iblogger.org/87763413621.pdfIn PDF document text
    • https://danupinizagene.weebly.com/uploads/1/3/1/4/131483344/finogisava.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
    • http://zowomazo.epizy.com/holt_texas_algebra_2_textbook.pdfIn PDF document text
    • https://6b9ff03a-ef48-417a-a14c-919df0f903d0.filesusr.com/ugd/f459ea_0ee1c37951954e8c862e185a549c16e6.pdf?index=trueIn PDF document text
    • https://6ce95562-7558-49ee-a7b0-b3003db3b0e9.filesusr.com/ugd/d13e1f_88382ae6fa9e4e9895b6801ea5374441.pdf?index=trueIn PDF document text
    • https://28546a20-d0cc-4b82-bb4f-6711990cd5a3.filesusr.com/ugd/0bcf16_e04f894cbb044af5b34018be20b2b564.pdf?index=trueIn PDF document text
    • http://keporumutiwem.epizy.com/qaseeda_burda_shareef_book.pdfIn PDF document text
    • http://konevimojo.epizy.com/ssf2_sasuke_mod.pdfIn PDF document text
    • https://836291d8-7b77-40db-be8c-3105928c7ef3.filesusr.com/ugd/aae074_5b28f807095a4f369a6029c3058cb22a.pdf?index=trueIn PDF document text
    • http://gajovab.epizy.com/tamil_meme_templates_hd.pdfIn PDF document text
    • http://xuletesowugi.epizy.com/lobopuzapuralesuxoje.pdfIn PDF document text
    • https://13505be9-6d4c-4fcc-aa83-e957692808af.filesusr.com/ugd/2e16aa_746ae6e1a2b24e2aa7495a644ce4ddb0.pdf?index=trueIn PDF document text
    • http://kajifota.epizy.com/haunted_house_movie_in_tamil.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_off0000d3d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D8 5164 bytes
SHA-256: 20d03a935653bd34609795722ac232d27092fb322663af7639c95d7cb67e4325
font_01_sfnt_off0000e550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE550 10048 bytes
SHA-256: df75f01fe1763e430bfb56e0c08425c4500ee32569a343644126660380b817eb
font_02_sfnt_off000107b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B9 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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