Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbc632efa5ffa05a…

MALICIOUS

PDF

87.1 KB Created: 2021-05-26 07:42:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 6fb7b06f31f54d7d12cf2d31e6c16fe9 SHA-1: aa772ffdb8d4723285b105a580edadf2f70225a3 SHA-256: fbc632efa5ffa05a3bb0c37df6fe0b60401d0797cfcbb10e5c7b13293b578147
246 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are associated with cracked software keywords, indicating a link farm for SEO manipulation. The heuristic 'SE_SECRET_RECOVERY_LURE' suggests the document may also attempt to phish for sensitive recovery information. The presence of multiple external URLs and the nature of the content strongly suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://zajinet.ru/strik?utm_term=easeus+mobisaver+for+android+5.0+serial+keygen+crack PDF link annotation
    • https://sovinupuni.weebly.com/uploads/1/3/4/7/134762808/a21535.pdfIn PDF document text
    • https://siromalad.weebly.com/uploads/1/3/5/3/135312661/varesu.pdfIn PDF document text
    • https://zalirojojates.weebly.com/uploads/1/3/4/6/134606979/185fa246556b947.pdfIn PDF document text
    • https://paduxadoduxim.weebly.com/uploads/1/3/0/7/130775016/nilulimosapi.pdfIn PDF document text
    • https://damasidegiked.weebly.com/uploads/1/3/1/4/131411688/xilis-nepuwuniva-kuzafikezud-sonivi.pdfIn PDF document text
    • https://zalopajozi.weebly.com/uploads/1/3/1/4/131453352/4726998.pdfIn PDF document text
    • https://tinozuxitijerel.weebly.com/uploads/1/3/4/5/134528375/3239785.pdfIn PDF document text
    • https://zefipoxiba.weebly.com/uploads/1/3/2/6/132681281/dosejajibelav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c0cdcd8-e523-4681-b4dc-045da6f8f8a4/78723503900.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dca0aa94-95ff-4662-9a47-78c9017c1792/88098474039.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33756bd8-d446-40ac-89cd-f2ccc9f6cf19/momosunareve.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/bapivarorifegesafitamu.pdfIn PDF document text
    • https://s3.amazonaws.com/goveruduzewoxu/kozobizarorodekoxorima.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/2019_gartner_magic_quadrant_for_analytics_and_business_intelligence_platform.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51acdbe4-87e0-447a-9f4e-66fe7c122d40/what_is_the_portal_system_of_circulation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5762791-77d2-4ba1-a020-614fccdf9d1d/43087379221.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/31371870237.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85aa6101-1d13-4740-b41b-c505edae798f/jitterbug_phone_for_seniors_verizon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f064f54-0293-472c-8e2d-b700a17ef590/4425903660.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ec13db6-fad1-4278-a74b-d064381fff20/67437939993.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9de2aaea-fe1b-46eb-bf8b-d806177fbd89/81975027033.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_off000109e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E5 2880 bytes
SHA-256: 5f03d2c6bc08d28d18892b3fd5153044a2fff6aad81dd629dfd07635bf6cf50e
font_01_sfnt_off00011422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11422 5964 bytes
SHA-256: 1523de4507e95c14dc8baab9bb6fbaaa6dc49107fa61b28842b1544900df113a
font_02_sfnt_off00012878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12878 11012 bytes
SHA-256: fa80e16a567a5848c9622acb74e5bd7600d9b30d4a12d7cbebc8f3a4fe13ed35

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