Malicious PDF — malware analysis report

Static analysis result for SHA-256 08cfe9d07fa3ca58…

MALICIOUS

PDF

113.0 KB Created: 2021-03-23 01:55:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 7864c951538c7ec4effa978489ed1d2e SHA-1: 45416e8ce8ec41ae1f5b2cd68ee54dfd6eb98f90 SHA-256: 08cfe9d07fa3ca582eb5a31af22685ce6275483b4a9c7fd2f75989b61c99c286
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, indicating a link farm designed to direct users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://golowaki.ru/wix?keyword=appchina+apk+%25D9%2585%25D8%25B9%25D8%25B1%25D8%25A8 PDF link annotation
    • https://cdn.sqhk.co/vinogusi/bggfdjj/boxufebizaxevi.pdfIn PDF document text
    • https://cdn.sqhk.co/fogobewataja/hjcigjc/7744232936.pdfIn PDF document text
    • https://nuzunovi.weebly.com/uploads/1/3/5/3/135314570/bb4cb619a5f51.pdfIn PDF document text
    • http://trikotoria.ru/howard_miller_brass_desk_clockqzkl7.pdfIn PDF document text
    • https://kitozegukelod.weebly.com/uploads/1/3/6/0/136056839/takolozonim-sitonuguzuni-figutale.pdfIn PDF document text
    • https://toxupenowa.weebly.com/uploads/1/3/4/0/134042648/8236080.pdfIn PDF document text
    • https://pixigakamorage.weebly.com/uploads/1/3/4/3/134351623/320ca3a833645db.pdfIn PDF document text
    • https://luletifolavok.weebly.com/uploads/1/3/4/3/134369244/10e2d3bb51102.pdfIn PDF document text
    • http://prosale.company/likekileramorabokezeravety3jz.pdfIn PDF document text
    • http://lighttravel-ng.com/penirarobra3.pdfIn PDF document text
    • https://mafatuxaxi.weebly.com/uploads/1/3/1/3/131384293/zufejafovuviju.pdfIn PDF document text
    • https://cdn.sqhk.co/leporolino/hjiZhh6/famit.pdfIn PDF document text
    • http://lngcliente.com/nigawubeniwixogumixonarcthzo.pdfIn PDF document text
    • https://dilopapavi.weebly.com/uploads/1/3/4/7/134705518/gazobapawusoduki.pdfIn PDF document text
    • http://tikanaw.mypressonline.com/51634487608.pdfIn PDF document text
    • https://ribebofav.weebly.com/uploads/1/3/2/6/132681502/94400.pdfIn PDF document text
    • https://cdn.sqhk.co/xojoreve/iagsghV/dexojezedex.pdfIn PDF document text
    • https://papobujiwirila.weebly.com/uploads/1/3/1/4/131453114/fizimorufulurop_bagoxulorufebif_banamuvo_joweguxur.pdfIn PDF document text
    • http://megantv.site/craft_cms_search_form7r0kt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://73e25548-3913-4bbb-aa69-a1b25f69568d.filesusr.com/ugd/cece23_2e35768a48784e53aad723ea61880242.pdf?index=trueIn PDF document text
    • https://0793e221-2e7e-4176-aae8-4ff4b75d8f7a.filesusr.com/ugd/64bd79_6849806c161241bc88037a90a7e274ee.pdf?index=trueIn PDF document text
    • http://xepuzakudera.atwebpages.com/ortopedia_pediatrica_de_staheli.pdfIn PDF document text
    • http://sabixukavizom.myartsonline.com/fumiki.pdfIn PDF document text
    • https://09d7e2b9-79a3-4876-9e00-73a1ba4263a4.filesusr.com/ugd/92fcd7_7af67d093c514b6f82ffa9363f4d5855.pdf?index=trueIn PDF document text
    • https://434dcbc4-7bd9-40fe-99bf-e102daebf961.filesusr.com/ugd/07ef24_1987e761be2f4e53829c7eccc37cda34.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00017ba5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x17BA5 31672 bytes
SHA-256: b7dcff15e5fc832554de1dccdc10e972ae53108b94ecb9efcd75d7c2d24e7409
font_00_sfnt_off000133a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133A6 4768 bytes
SHA-256: 120d2b9fb4e696f13e755596234391d7ca355538e84884ac6c840ee25c7b1642
font_01_sfnt_off000143db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143DB 9568 bytes
SHA-256: d5ef90ae39b3ec21eb46685cb60a7f1cc46d81beea23f9fa9a876af9cf144c1b
font_02_sfnt_off000164bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164BB 16564 bytes
SHA-256: d79fbbea9e2188e7d48fbd22397a632d4251ed72e2d24fbbff1a9919212b6dab

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