Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9309f40ca8977a1…

MALICIOUS

PDF

71.9 KB Created: 2021-04-08 09:09:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: c4d217333432e763153032f954fd6181 SHA-1: acd86f8b1b3a052d61cc799f60b3bab26475bff4 SHA-256: e9309f40ca8977a1d4fb9ea61e72c30d89e726fb2ac8005e10fe5d6f1a2e23e9
126 Risk Score

Malware Insights

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

The sample was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one pointing to 'maypoin.ru', suggesting a phishing or malware distribution lure. The PDF structure and embedded links indicate it's likely part of a phishing campaign, possibly using a spearphishing attachment vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/wix?keyword=jackie+medina+facebook PDF link annotation
    • http://com-servers.online/tirenutiwudebewinajoj044j.pdfIn PDF document text
    • http://begemot.space/pevinetjwwlg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488558/normal_6043344f35168.pdfIn PDF document text
    • http://hardcreditcheck.info/dawezegolexosuperudinadajlg1m.pdfIn PDF document text
    • https://resafuki.weebly.com/uploads/1/3/1/3/131398359/3302227.pdfIn PDF document text
    • http://fherixq.com/how_does_william_afton_diebx7p8.pdfIn PDF document text
    • https://pitamiled.weebly.com/uploads/1/3/4/0/134098016/dff14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475864/normal_606e40e16f7db.pdfIn PDF document text
    • https://tofajoxoroj.weebly.com/uploads/1/3/1/6/131636991/1730802.pdfIn PDF document text
    • https://demaxezobenila.weebly.com/uploads/1/3/1/8/131856353/fuzebelosajobe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385617/normal_60477c79501c4.pdfIn PDF document text
    • https://timurikamaz.weebly.com/uploads/1/3/1/4/131406182/tatinavulobemap.pdfIn PDF document text
    • https://cdn.sqhk.co/nodewanase/hcoRyii/word_search_maker_software_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/joxusozomilo/iahfgen/91152909106.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/njgpge2/31809103321.pdfIn PDF document text
    • https://cdn.sqhk.co/mexovaru/fjgYp4U/24650386023.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://juvizerosuzabuk.rf.gd/canter_assertive_discipline.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/tft_item_guide_new_patch.pdfIn PDF document text
    • http://ditumok.epizy.com/proses_pembentukan_batuan_metamorf.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/lines_of_symmetry_quadrilaterals_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/what_is_the_latest_news_now_in_israel.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/liranizixopekowokopu.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_off0000dbe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE1 5052 bytes
SHA-256: c9bd6aefbf113ea79ee14e651fd719cebb0e94ea9eb460852458c4386595b7d7
font_01_sfnt_off0000ed0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED0F 10912 bytes
SHA-256: d5ee93176697352cbac8292fed50c8aee22273c5995860de501d4e6db76b44b9

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