Malicious PDF — malware analysis report

Static analysis result for SHA-256 70b0444b7771e215…

MALICIOUS

PDF

77.8 KB Created: 2021-03-10 07:31:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: be812d6b07bdfd74a8d48d4cdf808ad3 SHA-1: 3945092a557135b9e09510d0fd0b7520d307ca03 SHA-256: 70b0444b7771e215f443aaeea51b246b8cb8c283446da63cb083d60908e6b22a
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external URLs, with a significant number hosted on disposable domains, suggesting an attempt to manipulate search engine results or redirect users to potentially malicious content. The document body is heavily obfuscated and unreadable, providing no clear user-facing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dugedepap.ru/wix?keyword=georgia+regions+map+2nd+grade PDF link annotation
    • http://tifoxikutawe.sportsontheweb.net/dell_poweredge_2950_ems01_specs.pdfIn PDF document text
    • http://thedouche.xyz/jelujagodewugazomagosnpcv.pdfIn PDF document text
    • http://ca-management.website/ship_cargo_manifest_formrv6fe.pdfIn PDF document text
    • https://tazuwadafif.weebly.com/uploads/1/3/4/8/134857375/tavol_tununa_sobuvuje_fijuzevagezado.pdfIn PDF document text
    • https://belexikezetuvom.weebly.com/uploads/1/3/0/7/130775063/rafonazikasixeg.pdfIn PDF document text
    • http://opensoda.pro/vivetisolda7rl.pdfIn PDF document text
    • https://rizogedimawe.weebly.com/uploads/1/3/0/7/130739598/b60a4a0.pdfIn PDF document text
    • http://braco.ru/tekukunafetugukapu8qwpw.pdfIn PDF document text
    • http://startbastar.online/732179714696qm0d.pdfIn PDF document text
    • http://dabosesavedevet.medianewsonline.com/delonghi_2300w_ceramic_panel_heater_review.pdfIn PDF document text
    • http://logvoz.ru/62813259679wiwg7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xomapagovujux.atwebpages.com/panasonic_kx-tgc210_white.pdfIn PDF document text
    • https://1ebfeea1-7d02-43b8-8f0a-002c87bc7f75.filesusr.com/ugd/50dcf6_d43316d046a740f0b6d103f7b65991eb.pdf?index=trueIn PDF document text
    • https://24976a62-ea59-4ca6-8500-d0bd08f9a094.filesusr.com/ugd/65a075_719ad8a1542c4a24b259e2892462627a.pdf?index=trueIn PDF document text
    • https://69cf8a46-0d3d-4b71-8fd1-93df925da18e.filesusr.com/ugd/e4064d_10d4316398a4487fbf3e41bde1518c18.pdf?index=trueIn PDF document text
    • https://2a983b51-2e13-4971-8c1f-a5bca3ab4353.filesusr.com/ugd/e1a791_ffcbd48a463f4b51bd301ed7b41af536.pdf?index=trueIn PDF document text
    • https://07d68bf2-0661-47e2-9ffe-eae068a071af.filesusr.com/ugd/fef806_0cf62e18ff4644818b88634a92e49174.pdf?index=trueIn PDF document text
    • https://f85e9a30-dbb9-40fd-a66d-53bd7daafe07.filesusr.com/ugd/1b9faa_37fd0f9741144e528068d521f91be989.pdf?index=trueIn PDF document text
    • https://9f9bd9fa-00fe-4673-b34e-9a629881f524.filesusr.com/ugd/09273f_d1a5ee87f20b43c1a7afdc45e3f6a753.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_off0000f4ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AC 5412 bytes
SHA-256: 2482c90a18d31ca61f19627f62c4362d83630bb1ba3623c8e409d6b1319c163e
font_01_sfnt_off00010703.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10703 10196 bytes
SHA-256: 8789e79530d95684bb908dbabaf4077712e6465408e0df39e8f2aa9c736af747

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