Malicious PDF — malware analysis report

Static analysis result for SHA-256 eec43e16de8e43f6…

MALICIOUS

PDF

86.8 KB Created: 2021-03-05 23:32:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 8fb8490ff61232fdd64e590894631759 SHA-1: 4eb280555e2d8f668f727249149690520448755b SHA-256: eec43e16de8e43f6d3720801aa22455da69fb8e1ee0ba1c17d7918491ea612e9
226 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO poisoning attempt. The heuristic 'SE_PAYMENT_REDIRECT_LURE' suggests the content is designed to trick users into believing there are changes to payment instructions, a common tactic in business email compromise. While no scripts were explicitly extracted, the PDF structure and numerous URLs point towards a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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://jumiwimov.ru/wix?keyword=realm+of+the+mad+god+guide+2019 PDF link annotation
    • https://jasitonil.weebly.com/uploads/1/3/4/0/134096785/dapawutow.pdfIn PDF document text
    • http://24goodstore.site/28782536683n1rg0.pdfIn PDF document text
    • https://bapajoronugenig.weebly.com/uploads/1/3/4/2/134234589/6013492.pdfIn PDF document text
    • https://webexozaputer.weebly.com/uploads/1/3/2/6/132681415/ee1f0c7bc95b.pdfIn PDF document text
    • https://pumegamafe.weebly.com/uploads/1/3/4/4/134498449/wutajijulef-kezuperapatafe-lizogekexed.pdfIn PDF document text
    • http://help-igcopyright.xyz/74502446009z2476.pdfIn PDF document text
    • http://particulieres-societegenerale.best/29354064151566hn.pdfIn PDF document text
    • http://gexomafe.mypressonline.com/rain_dial_rd_600_manual.pdfIn PDF document text
    • http://bagomebefekixob.getenjoyment.net/94449067496.pdfIn PDF document text
    • http://instapodarok365.site/modern_refrigeration_and_air_conditioning_21st_editionpgx8x.pdfIn PDF document text
    • http://vibolofisef.mywebcommunity.org/xodezerulidisuguraxogota.pdfIn PDF document text
    • http://burrrhey.tech/ranelisivuniuhtls.pdfIn PDF document text
    • http://luxasireku.sportsontheweb.net/21483630065.pdfIn PDF document text
    • http://trokot-shopnew.online/80015781791ok1sc.pdfIn PDF document text
    • https://wirorovikematu.weebly.com/uploads/1/3/1/0/131071137/7262446.pdfIn PDF document text
    • http://gidpopiteru.com/united_states_air_force_academy_average_actfhp2u.pdfIn PDF document text
    • https://sepafolelobonel.weebly.com/uploads/1/3/4/6/134614676/bizefovajomiw.pdfIn PDF document text
    • https://mixifomako.weebly.com/uploads/1/3/1/1/131164472/4116200.pdfIn PDF document text
    • http://maddot.space/funny_jokes_questions_and_answers_tagalogfneoy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385009/normal_5fd67cf2a69b0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483833/normal_6007fb8eed00a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gajamozaxekega.atwebpages.com/fosugag.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_off00011804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11804 5536 bytes
SHA-256: 6dbe6d9ffe9c7a35e70af8e135a7556374e1c378c84716b007bec8201432c7b1
font_01_sfnt_off00012ac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AC1 10456 bytes
SHA-256: 010389474716d6c09ca2f3fce8ebbad2861632d14a622a82c76c8817b90c1fd6