Malicious PDF — malware analysis report

Static analysis result for SHA-256 86b8aeb7def2d10b…

MALICIOUS

PDF

78.0 KB Created: 2021-04-14 15:40:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b544b1f6126b8b511b7cdfa742200f0d SHA-1: 2a55f62299119a2e03afaefbb9d4bfd26a0ceb46 SHA-256: 86b8aeb7def2d10b99dc98e59d2fb9fc661c46c403d5ed24d48041f8666737da
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a payment redirection lure. It contains a large number of external links, many hosted on disposable domains, suggesting an attempt to distribute malicious content or phish for credentials. The heuristic 'SE_PAYMENT_REDIRECT_LURE' specifically indicates the document describes new or changed bank instructions, a common tactic in business email compromise attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • 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.
  • 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://ponafet.ru/strik?utm_term=td+bank+wire+transfer+limit PDF link annotation
    • http://koponegigat.medianewsonline.com/how_to_read_a_carbon_monoxide_detector.pdfIn PDF document text
    • https://cdn.sqhk.co/difigobon/e3vh4J4/61376119460.pdfIn PDF document text
    • http://dolevukijera.iblogger.org/21865163820.pdfIn PDF document text
    • https://rinuvigilositu.weebly.com/uploads/1/3/4/4/134463450/givajike.pdfIn PDF document text
    • http://gidigunorefe.iblogger.org/3645348714.pdfIn PDF document text
    • https://fimudelowuj.weebly.com/uploads/1/3/1/4/131455024/4361110.pdfIn PDF document text
    • https://zuxosudeti.weebly.com/uploads/1/3/4/3/134359900/482747.pdfIn PDF document text
    • https://cdn.sqhk.co/pafatewodoju/z9bQggi/transparent_screen_printing_ink.pdfIn PDF document text
    • http://muvisaxof.iblogger.org/barreras_para_arancelarias.pdfIn PDF document text
    • https://movabeze.weebly.com/uploads/1/3/0/8/130814110/botixefomo.pdfIn PDF document text
    • https://pojekemo.weebly.com/uploads/1/3/4/4/134469054/turalomegosev.pdfIn PDF document text
    • https://menafemudiwifog.weebly.com/uploads/1/3/0/8/130813668/6045981.pdfIn PDF document text
    • https://cdn.sqhk.co/vawadawuleja/jdidYji/97926657075.pdfIn PDF document text
    • https://cdn.sqhk.co/gilikomow/8uqijgh/juzewoxavivo.pdfIn PDF document text
    • https://cdn.sqhk.co/newuvuze/FaDhiih/fapiseximivo.pdfIn PDF document text
    • https://joruluzadazalit.weebly.com/uploads/1/3/4/6/134673717/814504.pdfIn PDF document text
    • https://koxizekeb.weebly.com/uploads/1/3/4/7/134770308/733907e2.pdfIn PDF document text
    • http://jorowijedo.mywebcommunity.org/how_to_get_starbucks_schedule_online.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://larovitivejel.atwebpages.com/33138164020.pdfIn PDF document text
    • https://f5f74d4f-f804-4d9b-9bfa-9964b2756261.filesusr.com/ugd/e389b3_6cf557fe96014d14a810d31bfc9bddfd.pdf?index=trueIn PDF document text
    • http://naburonip.myartsonline.com/kapavotovup.pdfIn PDF document text
    • http://fudewisukot.rf.gd/canny_edge_detection_in_image_processing.pdfIn PDF document text
    • http://mojedebebetum.epizy.com/vifananela.pdfIn PDF document text
    • https://012a8781-80b6-4d33-8f63-56d56ef93f15.filesusr.com/ugd/6d3794_226490a55c194de5aee355e7e277cf25.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF323 5300 bytes
SHA-256: 4f05314c65ecd418ecd3904f9a6dfa4e438bf9337acc8525f4486e04b0eb7461
font_01_sfnt_off00010523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10523 11016 bytes
SHA-256: 991e48676ec3b5501acc7ad99dbc1cacd9ddbe0ef606f65769c5c5038f90973a