Malicious PDF — malware analysis report

Static analysis result for SHA-256 be3c98024130d926…

MALICIOUS

PDF

75.7 KB Created: 2021-06-05 17:25:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ade9936e8f925bd38d3ebfb5bc986151 SHA-1: cbb6eac11217e71087ac17fee6b4d20aec8ce5fe SHA-256: be3c98024130d9262e095ca753b747660c03c08af8c527b44179bcb6bc8a7a42
134 Risk Score
Tags
free-cdn-ebook-manual-lure

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 an invoice-themed 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 0.9997

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 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://jottigo.ru/123?utm_term=avery+label+template+5195+openoffice PDF link annotation
    • https://sikukaposarimi.weebly.com/uploads/1/3/5/3/135307882/7edfaa98926943.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471711/normal_5ff05e9b15545.pdfIn PDF document text
    • https://xesisezedowajax.weebly.com/uploads/1/3/4/7/134729639/kapawotitolesudexip.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381536/normal_5ffe452d877dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369173/normal_60219e3c4af58.pdfIn PDF document text
    • https://wanesutilujat.weebly.com/uploads/1/3/4/8/134868149/d23d58.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mituxap.pbworks.com/f/xujusuli.pdfIn PDF document text
    • http://zupelapowi.pbworks.com/w/file/fetch/144499047/pepenulepaloda.pdfIn PDF document text
    • http://lekuzax.pbworks.com/w/file/fetch/144418500/rosovividositubali.pdfIn PDF document text
    • http://dekokos.pbworks.com/f/80883574407.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/663bd25e-1065-470d-9968-e3e20a778cf9/arithmetic_and_geometric_sequences_word_problems_worksheet_answers.pdfIn PDF document text
    • http://niluputevi.pbworks.com/w/file/fetch/144655959/kingdom_hearts_strategy_guide_download.pdfIn PDF document text
    • http://zepadatoju.pbworks.com/f/acordes_de_teclado_cumbia.pdfIn PDF document text
    • http://kepigiwup.pbworks.com/f/8252356334.pdfIn PDF document text
    • http://jetipufagi.pbworks.com/f/gidevu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/957559df-5d0e-400d-956c-1cf87e2ce00a/how_to_set_clock_on_kenwood_dpx500bt.pdfIn PDF document text
    • http://watusuxipidu.pbworks.com/f/abstract_noun_worksheets_for_class_3_with_answers.pdfIn PDF document text
    • http://kedetuwi.pbworks.com/w/file/fetch/144427872/53580350425.pdfIn PDF document text
    • http://xuvabufoj.pbworks.com/w/file/fetch/144556152/8573531616.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7948789-48fd-42af-b2dd-03bfac03e0cc/black_and_decker_hedge_trimmer_battery_not_charging.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCA 5604 bytes
SHA-256: 7d0402f1b146de8853a8d1d5f311c9943ceaa18642919f14832e9eb8a67bb964
font_01_sfnt_off000100e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E0 9624 bytes
SHA-256: 8abaaa64a92526c575915e60439066a05a52c4d4363c33b8c318feb3743aff18

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