Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a1d90bafe82c3ee…

MALICIOUS

PDF

72.0 KB Created: 2021-03-10 02:36:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 12c0c1833df4871a6c88dbc228007803 SHA-1: 3a0adc97829e687247b62e14563d177a3193cdb0 SHA-256: 3a1d90bafe82c3ee5a2e09d722e2743872f466c0ccbb5d016977b45c99b61ef6
184 Risk Score

Malware Insights

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

The PDF contains a large number of external links to various domains, many of which appear to be disposable or used for SEO manipulation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to distribute further malware or engage in phishing. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7833

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 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
  • 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://druttle.ru/award?keyword=bergey+s+manual+of+systematic+bacteriology+volume+1+pdf+download PDF link annotation
    • http://hackins.site/bruno_latour_down_to_earthzlao2.pdfIn PDF document text
    • https://mafenipo.weebly.com/uploads/1/3/4/8/134879688/mogosalukusewijof.pdfIn PDF document text
    • http://kurs1.xyz/svetlana_alexievich_secondhand_timezbwf1.pdfIn PDF document text
    • https://gixopujo.weebly.com/uploads/1/3/0/7/130775076/21557165dd.pdfIn PDF document text
    • https://zijolafazul.weebly.com/uploads/1/3/0/8/130873795/rovononalon-jitukuga.pdfIn PDF document text
    • http://souve.me/hmrc_online_tax_creditsi5jk2.pdfIn PDF document text
    • http://0fruits.space/nozareses0j8ka.pdfIn PDF document text
    • http://how2clever.com/dr_browns_bottle_warmer_e1_error287tu.pdfIn PDF document text
    • https://sakurulemiba.weebly.com/uploads/1/3/0/9/130969926/xifotilebija.pdfIn PDF document text
    • http://podeves.xyz/telarexuxofbr8i.pdfIn PDF document text
    • http://rrrrkkkkk.space/strongest_fist_of_the_north_star_charactersxco2k.pdfIn PDF document text
    • http://akmurzina.com/legenewirexod424c.pdfIn PDF document text
    • https://komipakokituk.weebly.com/uploads/1/3/5/9/135993761/5180727.pdfIn PDF document text
    • http://randname.ru/75437620854s4ipj.pdfIn PDF document text
    • http://blockingscenery.com/what_does_hulu_have_that_netflix_doesnti2ufe.pdfIn PDF document text
    • https://wajifisawebe.weebly.com/uploads/1/3/4/4/134480175/003b4c8.pdfIn PDF document text
    • https://jezilifubi.weebly.com/uploads/1/3/4/8/134887413/befabumozuzu.pdfIn PDF document text
    • http://tersq.space/vunupv3k74.pdfIn PDF document text
    • https://vobikonim.weebly.com/uploads/1/3/5/3/135390296/zebemugunevegamop.pdfIn PDF document text
    • http://karnaval.host/active_listening_skills_definition92s0j.pdfIn PDF document text
    • https://labufixurugon.weebly.com/uploads/1/3/4/8/134873424/340d13bac881879.pdfIn PDF document text
    • http://visionnew.xyz/zaxedemaxikudaxitiruvakom2azrq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFE 5968 bytes
SHA-256: effe87f9a9808e369e574c958659cda14add13fc2b2e65cd9fa8e3c9b82cd7f8

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