Malicious PDF — malware analysis report

Static analysis result for SHA-256 96b01304fccdb69a…

MALICIOUS

PDF

83.3 KB Created: 2021-05-04 03:40:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 908146570dc5f7a08a73fa2af56be418 SHA-1: e955d9ba55e4205514d544c2e2039417b421b4c6 SHA-256: 96b01304fccdb69ad26c503120960586ce32e47c3dde98fa5e62b34e45d2209e
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains numerous embedded URLs pointing to link farms hosted on disposable domains, suggesting a phishing or ad-revenue generation scheme. The presence of external URIs and a link farm heuristic strongly supports a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://leonvi.ru/strik?utm_term=how+much+is+a+nikon+d40+worth PDF link annotation
    • https://berebexamoleti.weebly.com/uploads/1/3/1/3/131384136/fezunuzubejo.pdfIn PDF document text
    • http://kaxavetaxudu.mywebcommunity.org/alicante_bus_map.pdfIn PDF document text
    • http://wusazododapir.iblogger.org/wovapelikig.pdfIn PDF document text
    • http://tomorubi.22web.org/bsc_nursing_rajasthan_online_form_2019.pdfIn PDF document text
    • http://sanelobazigi.medianewsonline.com/32616459553.pdfIn PDF document text
    • http://vovavipegum.getenjoyment.net/is_there_going_to_be_a_dog_man_10.pdfIn PDF document text
    • https://durafozo.weebly.com/uploads/1/3/0/7/130740533/wijevufozuvejen-saxif-lipijatixuziv.pdfIn PDF document text
    • https://vukexelisijaka.weebly.com/uploads/1/3/1/0/131070195/9315830.pdfIn PDF document text
    • https://cdn.sqhk.co/banifiga/jyhbnVx/pigemofapijupusatafazu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444638/normal_6004062227567.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451932/normal_5fded46a3b4b1.pdfIn PDF document text
    • http://vozuzutiwajuzip.getenjoyment.net/42358974704.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449783/normal_6005d9bf96aff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372399/normal_6002bb2442ae0.pdfIn PDF document text
    • https://cdn.sqhk.co/lirebirab/jij4vdp/temple_run_3_release_date.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381980/normal_6002176c83262.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mujebik.atwebpages.com/44743751454.pdfIn PDF document text
    • http://kexeban.rf.gd/98154172635.pdfIn PDF document text
    • http://renozupopobija.epizy.com/zirotufageduxamikixo.pdfIn PDF document text
    • http://jowawaba.atwebpages.com/91007692378.pdfIn PDF document text
    • http://dijipola.onlinewebshop.net/define_consumer_behaviour.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000105e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E3 5492 bytes
SHA-256: 570e0566c24bcabe99c41ccab4b2d4183f7482cb74aae3043048c2e13730b2ae
font_01_sfnt_off0001187e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1187E 11616 bytes
SHA-256: 41f3c2dfed5ad942ba71f91882a15431c95616943bc2d679d76e7467c4a6b2ad

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