Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7d9b4b94d7c0117…

MALICIOUS

PDF

79.0 KB Created: 2021-04-11 20:06:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: bba65596a95c31e5bbb917b2012bc45e SHA-1: 07f34b2fdc555d66ebe98c79e71cdd91c86bc753 SHA-256: b7d9b4b94d7c0117ef3a087e23336370e428fe67f2fd644e90f018d373538e09
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document, likely leveraging social engineering to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://druttle.ru/strik?utm_term=john+deere+lawn+tractor+parts+manual PDF link annotation
    • http://tibuwajeta.22web.org/3602113001.pdfIn PDF document text
    • http://sifisomatexow.sportsontheweb.net/guitar_case_chord_book.pdfIn PDF document text
    • https://lavupujewefi.weebly.com/uploads/1/3/4/6/134631736/keborewezipeno.pdfIn PDF document text
    • http://nejufez.22web.org/java_jsp_format_number.pdfIn PDF document text
    • https://fiwigerisen.weebly.com/uploads/1/3/1/4/131408459/kavinasubeju-juxazab.pdfIn PDF document text
    • http://lowabunuzoxa.getenjoyment.net/java_programming_notes_for_mca.pdfIn PDF document text
    • https://robigatif.weebly.com/uploads/1/3/0/8/130873787/e49f01302d.pdfIn PDF document text
    • http://watarutab.22web.org/pisinijo.pdfIn PDF document text
    • http://vodabezoli.iblogger.org/banato.pdfIn PDF document text
    • http://jiviwizun.iblogger.org/how_to_pair_photive_bluetooth_speaker.pdfIn PDF document text
    • http://wuxapogetal.iblogger.org/pes_anserine_bursitis_stretches.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/luborinizu/autopsy_of_jane_doe_480p.pdfIn PDF document text
    • http://satuzexo.epizy.com/critical_thinking_skills_book.pdfIn PDF document text
    • http://ferizitemimov.epizy.com/4th_grade_math_review_packet.pdfIn PDF document text
    • http://sekevidijonuji.rf.gd/33660509590.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/finefinigupunosusavivekaz.pdfIn PDF document text
    • http://webuguvafu.rf.gd/53342223486.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/43150768093.pdfIn PDF document text
    • http://nadefivetokilak.rf.gd/34173481079.pdfIn PDF document text
    • http://wejifofodig.rf.gd/cathode_ray_tube_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/kdigo_guideline_lupus_nephritis.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/31145609371.pdfIn PDF document text
    • http://xugowosapiri.rf.gd/56861703690.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_off0000f55d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF55D 5396 bytes
SHA-256: 2e50295a9c6a63fc96ff2bff07d5211d17753ff51828cc8f2cc3ff578504dce7
font_01_sfnt_off0001079a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1079A 11452 bytes
SHA-256: 76cbc5f9a944814375c80cbe760973e92290f7fc955ba858b62ee6d6c410c5f3

Open this report in the interactive analyzer, or submit your own file for analysis.