Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d1c1ba8e3a984d8…

MALICIOUS

PDF

76.4 KB Created: 2021-05-16 08:59:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e3630ed61d2f3a9e3fd44bf585458ef7 SHA-1: dfdffc8aa3017893c2dfd3bf17428b3e55d788f3 SHA-256: 9d1c1ba8e3a984d8121f0ccd754442566f09ff114e5951d08df772b9514a9d1b
186 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. 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 0.9998

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://pelibifir.ru/strik?utm_term=casio+pathfinder+paw1500+replacement+watch+band PDF link annotation
    • http://gomigapujasep.sportsontheweb.net/48236830869.pdfIn PDF document text
    • http://wasegulom.mygamesonline.org/what_are_the_native_american_symbols.pdfIn PDF document text
    • http://xafesuvorolivig.scienceontheweb.net/fixalopoxu.pdfIn PDF document text
    • http://wozilimesiz.mypressonline.com/knee_effusion_treatment.pdfIn PDF document text
    • https://rufudejipuxege.weebly.com/uploads/1/3/5/3/135347647/sosajofigokozububopa.pdfIn PDF document text
    • https://lemamoramu.weebly.com/uploads/1/3/5/3/135348447/sopewunaxowa.pdfIn PDF document text
    • http://kojazunupetip.mygamesonline.org/architectural_acoustics_marshall_long_download.pdfIn PDF document text
    • https://lidafeli.weebly.com/uploads/1/3/4/6/134683499/961a22.pdfIn PDF document text
    • http://zeruxejobimal.mywebcommunity.org/john_b_watson_behaviorism.pdfIn PDF document text
    • https://ratopavitakam.weebly.com/uploads/1/3/4/4/134460251/sezirumixulifev.pdfIn PDF document text
    • https://nibiromevisike.weebly.com/uploads/1/3/5/2/135299411/zupemifutore.pdfIn PDF document text
    • http://gakukuketisalum.scienceontheweb.net/tuxajadamobobiti.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pidivatepijalaw.epizy.com/is_uncle_iroh_stronger_than_ozai.pdfIn PDF document text
    • http://favigagiwu.epizy.com/nexus_9000_macsec_configuration_guide.pdfIn PDF document text
    • https://e97408dc-4b05-4e3b-9f19-f4127feb49ef.filesusr.com/ugd/a42eed_cfa62a330e0c4a5fa54e3ff3fc63bbe1.pdf?index=trueIn PDF document text
    • https://677f84e8-2a3b-482a-8721-58d714100356.filesusr.com/ugd/086aec_215f05a502a24d84ab3ccdb363f9e6f5.pdf?index=trueIn PDF document text
    • http://gulejarapexovut.epizy.com/fevagarivovanix.pdfIn PDF document text
    • http://juxugalipexobow.epizy.com/ecg_rhythm_strips.pdfIn PDF document text
    • https://51fd5013-30c4-43d1-89ce-86564632a3b5.filesusr.com/ugd/9f06f8_87a8ecb88e0b40dbbf85776230974fdd.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

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_off0000e98a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE98A 5852 bytes
SHA-256: 6239cffbe523ac43f644f5b46be1b877d49a4d5766151b4e3af37cdf0bd4579e
font_01_sfnt_off0000fd5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5E 11308 bytes
SHA-256: cfd5a583b8ab5e737c854e7379e8fb3d375798e680b29111c21c8864764dc5d8

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