Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc7b10fd956572d8…

MALICIOUS

PDF

89.0 KB Created: 2021-05-16 02:22:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5d282db7b3c8d8aa9811fce0c3e4e52a SHA-1: ac6fb0500ca21dab7de905941e65fd72e2a8fd7f SHA-256: cc7b10fd956572d86a90109233fe05db5ffeae4891079e6985c4ade05f05710e
206 Risk Score

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. It uses a callback-phone (TOAD) lure. 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 0.9965

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=lg+440g+manual+english PDF link annotation
    • https://povuwifapijolak.weebly.com/uploads/1/3/4/2/134265363/4e4a03a4416ebf0.pdfIn PDF document text
    • https://mabaxezo.weebly.com/uploads/1/3/4/7/134766945/a73a94.pdfIn PDF document text
    • https://golinogejus.weebly.com/uploads/1/3/1/6/131606227/8577085.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426425/normal_5fd02b65687aa.pdfIn PDF document text
    • https://tegotaxuwore.weebly.com/uploads/1/3/2/7/132712324/pofuwu.pdfIn PDF document text
    • http://fodosokidorakig.22web.org/49024288526.pdfIn PDF document text
    • https://dixufewopirar.weebly.com/uploads/1/3/0/7/130775961/tolobagububalat_papaziwodav_razafag_torikozuri.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383704/normal_5fff29a39d59d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487905/normal_600df1a1cf0ec.pdfIn PDF document text
    • https://tafopolen.weebly.com/uploads/1/3/4/3/134396822/muwejavazojij_jezakox_beduxomi_zudulasixez.pdfIn PDF document text
    • https://xokebewogaxuwu.weebly.com/uploads/1/3/4/5/134588239/9365737.pdfIn PDF document text
    • https://zumabenem.weebly.com/uploads/1/3/4/6/134683433/47375e63a.pdfIn PDF document text
    • https://lexawuvake.weebly.com/uploads/1/3/4/6/134610488/jivedomafovuge.pdfIn PDF document text
    • https://waronovubuwige.weebly.com/uploads/1/3/4/6/134631102/zaruwexo-bewixipugop-pifewoma-fugebuxeg.pdfIn PDF document text
    • https://dadotetixaj.weebly.com/uploads/1/3/4/4/134404583/kemubasalabunu.pdfIn PDF document text
    • https://mowavowami.weebly.com/uploads/1/3/4/5/134591552/4308997.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481154/normal_6036d92000071.pdfIn PDF document text
    • https://kazirevuteguzug.weebly.com/uploads/1/3/2/6/132681824/2817396.pdfIn PDF document text
    • https://bezodidamivozel.weebly.com/uploads/1/3/2/6/132683328/2263747.pdfIn PDF document text
    • https://gigadejelurare.weebly.com/uploads/1/3/0/8/130874533/2170519.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tewederukafolez.rf.gd/100_egyptian_combed_cotton_percale_sheets.pdfIn PDF document text
    • https://5a060084-92f5-4e09-b02e-bbac8bb45871.filesusr.com/ugd/05c943_dd67d62a51374f68b12716a18d2a8d43.pdf?index=trueIn PDF document text
    • http://xurorovesi.epizy.com/makixe.pdfIn PDF document text
    • https://aece7fbc-7072-4055-9cfa-29e0da41b620.filesusr.com/ugd/e878fd_37bccb688c4749ebabe211854b8d670a.pdf?index=trueIn PDF document text
    • https://89d9876f-4e47-4433-ab5b-8da47ae3ae5c.filesusr.com/ugd/37c326_d5657aa0b4f34467854a1dee5b266a83.pdf?index=trueIn PDF document text
    • http://fobepufare.epizy.com/adrenaline_and_noradrenaline.pdfIn PDF document text
    • https://3bdad275-8828-414d-9063-9532e035d791.filesusr.com/ugd/c67d0c_5c03b573755f4b9a8dd50d6f9623e695.pdf?index=trueIn PDF document text
    • http://kaberitate.rf.gd/68066643021.pdfIn PDF document text
    • https://d1e6aceb-f258-402f-b59e-92ecb386693c.filesusr.com/ugd/2cc58f_d9d7b6e6b7e24f5093b2c1cb703bfeaf.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011a7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A7A 5176 bytes
SHA-256: a57e40225d091ab5b7fcd583e10edbeb455f41879940c3c2fee55a2d2ff361af
font_01_sfnt_off00012bfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BFC 12660 bytes
SHA-256: 6d052fdecf2e4ad824570b2fff66d6c7dcca3f9d7866ce9301746b5522ca8779