Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbe60a3ac9c64071…

MALICIOUS

PDF

71.3 KB Created: 2021-04-05 02:02:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: f7a1328238722ef89cfebab1d2d5366f SHA-1: abe6223115490f9b2a43f59ced03d9c9921010ea SHA-256: fbe60a3ac9c640715cc8619858bcf26bec88f65c57383d129751c7b2070b3966
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with many hosted on disposable domains, indicating a link farm or SEO poisoning attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the presence of numerous external URLs points to a delivery mechanism for further malicious content.

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 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://jacksth.ru/wix?keyword=f78-14st+tire+conversion PDF link annotation
    • http://rabizepafuxonag.mypressonline.com/antidote_book.pdfIn PDF document text
    • https://fumitofid.weebly.com/uploads/1/3/1/6/131637255/dc1e4e47aef1ff9.pdfIn PDF document text
    • http://titopemij.22web.org/penerorijur.pdfIn PDF document text
    • https://vaxulazazoju.weebly.com/uploads/1/3/4/5/134587837/pukelenome.pdfIn PDF document text
    • http://tubudemawaxoki.iblogger.org/report_basis_accrual_or_cash.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425909/normal_60618635c6468.pdfIn PDF document text
    • https://mopomavimixefor.weebly.com/uploads/1/3/1/1/131164117/furidol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368978/normal_5fd7a123b6172.pdfIn PDF document text
    • https://ritosameb.weebly.com/uploads/1/3/4/2/134266106/1852753.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393632/normal_5fc7a9a1e3e5a.pdfIn PDF document text
    • http://fopokigife.mywebcommunity.org/autobahn_map.pdfIn PDF document text
    • http://bowugimigu.22web.org/asus_ac1900_router_factory_reset.pdfIn PDF document text
    • http://pifanaliriwabo.mygamesonline.org/basic_networking_notes_free_download.pdfIn PDF document text
    • http://kerosijuvibeg.scienceontheweb.net/puwuluzesalevumefolel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kigojiki.epizy.com/accounting_and_finance_for_bankers_macmillan.pdfIn PDF document text
    • https://4bbf79d8-97e4-42de-9a75-948158c354f0.filesusr.com/ugd/52f5d3_2c2c85311ae644bdb07eef1d9dd44e64.pdf?index=trueIn PDF document text
    • https://3a00e800-a8eb-44ae-aafc-ae9aecab8e06.filesusr.com/ugd/1715bf_83bcbdf358064337a94ebb5c1da35ef9.pdf?index=trueIn PDF document text
    • http://dowirimidezifa.rf.gd/como_acoplar_varios_en_uno.pdfIn PDF document text
    • http://pimimozoji.myartsonline.com/how_to_write_log_base_e_in_calculator.pdfIn PDF document text
    • http://garuwefusu.epizy.com/10973992399.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_off0000d65b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD65B 5012 bytes
SHA-256: 07835900ce5aba41084546d0281baf84ac729f106d21e0cdd3070dec118f4a6c
font_01_sfnt_off0000e79d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79D 11416 bytes
SHA-256: af07225044135728a6ce596d1b8f415dc155a23a303c22aaa192310306ca1273

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