Malicious PDF — malware analysis report

Static analysis result for SHA-256 bec7c468bf56bb90…

MALICIOUS

PDF

81.7 KB Created: 2021-03-26 14:44:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 75faea53e25e063b5d35a5a28ef267de SHA-1: 564ce9bf527079786f571dd190d7bd065ef9ba9d SHA-256: bec7c468bf56bb909bd2ae1def05cb61deeed4766103a60e0a9fdc38ab51f17d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://dafemum.ru/strik?utm_term=safety+patrol+movie+trailer PDF link annotation
    • https://manobafezelibo.weebly.com/uploads/1/3/1/6/131636879/bojowesibo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365639/normal_5fefa7a527446.pdfIn PDF document text
    • http://mimowetoxizov.22web.org/wofiwix.pdfIn PDF document text
    • http://dadosib.22web.org/15165153450.pdfIn PDF document text
    • http://summ-green.fun/heidelberg_catechism_modern_englishcpdpi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413368/normal_6042e40f7e9fa.pdfIn PDF document text
    • https://roribevewo.weebly.com/uploads/1/3/4/5/134502196/guwogirunuzozemuzida.pdfIn PDF document text
    • http://wivuperafuzo.mypressonline.com/lacrosse_shooting_drills_for_beginners.pdfIn PDF document text
    • http://islemleriniz.org/what_does_brownie_mean_in_british_slangngflf.pdfIn PDF document text
    • http://zesozidim.iblogger.org/tratamiento_para_rinitis_alergica.pdfIn PDF document text
    • https://jekudadej.weebly.com/uploads/1/3/5/3/135301654/mojapebaga.pdfIn PDF document text
    • http://winoraama.fun/39246310572i58ge.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414866/normal_603b859058ed1.pdfIn PDF document text
    • http://tameeniraq.com/the_jewish_phenomenon_review0e2qt.pdfIn PDF document text
    • https://fipamowusaki.weebly.com/uploads/1/3/4/8/134879766/03e70f44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368487/normal_6049788af25ae.pdfIn PDF document text
    • https://sogatetemurus.weebly.com/uploads/1/3/4/3/134379625/505f1.pdfIn PDF document text
    • http://bewewafip.scienceontheweb.net/74848310831.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bodudenijijeb.onlinewebshop.net/91573040336.pdfIn PDF document text
    • http://juwiwigepumer.rf.gd/98281151900.pdfIn PDF document text
    • http://dopewaniwufew.epizy.com/40362380656.pdfIn PDF document text
    • http://migumirokive.epizy.com/how_to_set_the_time_on_a_tork_timer.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_off00010149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10149 5136 bytes
SHA-256: 850a14b51c30dfeec8b20fc57e74e5a064a0102878fc4dadf2256e947e9359f8
font_01_sfnt_off000112c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112C1 11392 bytes
SHA-256: 3c543dbd7e3036232777f71ef8b6ad11fde24efe14beac6a6d53b14d038fef00

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