Malicious PDF — malware analysis report

Static analysis result for SHA-256 390f62b419b76914…

MALICIOUS

PDF

76.6 KB Created: 2021-03-16 19:21:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: e3b0f08f8b285bef0930305035c086af SHA-1: f5e03276c9c163d3ce3c226e912443e247032dd3 SHA-256: 390f62b419b76914776085ee9ad920ca22dbaef5b5d40d73ded79b2fcfb6ca8b
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing attempt to redirect users to malicious content, likely related to obtaining identification, as suggested by the document body.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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
  • 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://pelibifir.ru/strik?utm_term=how+to+get+a+real+id+compliant+license+in+nj PDF link annotation
    • https://raminatu.weebly.com/uploads/1/3/4/5/134579417/a0a27ff822c3.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxuvedije/3bxn0hj/giboweporaxitagusija.pdfIn PDF document text
    • http://italdom.fun/bagawubalewajifzxua1.pdfIn PDF document text
    • https://nosisakapu.weebly.com/uploads/1/3/4/7/134773138/wexosez.pdfIn PDF document text
    • https://lukuxafibufogi.weebly.com/uploads/1/3/5/4/135400428/buvebiguz.pdfIn PDF document text
    • https://jujuguzifise.weebly.com/uploads/1/3/5/2/135299578/zememokevodopa.pdfIn PDF document text
    • https://cdn.sqhk.co/fuxuduxexi/ihqiipH/94584546827.pdfIn PDF document text
    • https://vobulesije.weebly.com/uploads/1/3/1/8/131857334/598ff79cc530.pdfIn PDF document text
    • https://firerokuk.weebly.com/uploads/1/3/1/1/131164187/1472439.pdfIn PDF document text
    • https://gererojakomez.weebly.com/uploads/1/3/1/1/131163960/3247313.pdfIn PDF document text
    • http://nudistoff.club/what_are_the_different_types_of_decorating2cxvw.pdfIn PDF document text
    • http://xomapometafa.iblogger.org/sigilevimamixiz.pdfIn PDF document text
    • http://ig-objectionform.com/31756972494dr5n8.pdfIn PDF document text
    • http://natikolom.site/sixilovunatubebaluz97u5k.pdfIn PDF document text
    • http://linza.media/is_the_subaru_2.5_a_good_enginekwcl0.pdfIn PDF document text
    • https://rupogasonewu.weebly.com/uploads/1/3/4/6/134653860/bumekojukepivubib.pdfIn PDF document text
    • http://vnds-v.website/definition_of_corporate_strategic_planning_process_involvesfs20s.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bojefej.epizy.com/79550721481.pdfIn PDF document text
    • http://levowemorunob.epizy.com/cassandra_leveling_guide.pdfIn PDF document text
    • http://ponusiniwanus.epizy.com/52684373357.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_off0000ed5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED5F 5520 bytes
SHA-256: 72f96def50f5bdbd2814f1cbab9f1fcdf57c8ac0f83c12b6bcc4fd849d782f4c
font_01_sfnt_off00010028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10028 10216 bytes
SHA-256: 65bce1de38789eced483bd222b18c3ec449d5d995f7a1cd2d707cabf21315a98

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