Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8703babfce79091…

MALICIOUS

PDF

45.6 KB Created: 2020-11-04 02:37:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 0232d6f428fb78a1570df0b1ed5ca67c SHA-1: 11e06c5a52589a6ddbea8d5f9251659916e18875 SHA-256: a8703babfce79091ec2c837b189c49482421a6e7d65cf300b6d37d52037e4f5b
174 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm or SEO manipulation tactic. The 'SE_CALLBACK_LURE' heuristic suggests a potential phishing or scam pretext, although the document body itself is heavily obfuscated and primarily contains metadata and URLs. No scripts were extracted from this sample, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://gettraff.ru/strik?keyword=economic+liberalism+ap+euro In PDF document text
    • https://fixasamajiwige.weebly.com/uploads/1/3/4/3/134318971/xavitejoxeko.pdfIn PDF document text
    • https://wanezevidika.weebly.com/uploads/1/3/4/5/134588498/4361337.pdfIn PDF document text
    • https://vifesomojijafi.weebly.com/uploads/1/3/4/3/134337648/a80101ab05deb2.pdfIn PDF document text
    • https://milavigik.weebly.com/uploads/1/3/2/8/132815866/fiwolufonabu_buxexufev_ziwipik_mokaxebolupati.pdfIn PDF document text
    • https://derodaju.weebly.com/uploads/1/3/1/6/131606282/getoze.pdfIn PDF document text
    • https://nudiwosesi.weebly.com/uploads/1/3/4/3/134317077/dabobuzinab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f061753-c583-4a9a-9281-fb42800ca80c/13546517374.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/sharper_image_sound_soother_alarm_clock_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/basics_of_networking_phi_learning.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/71928049413.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/radibibizapivukufewi.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/rimirifexitubamor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/778585b8-0576-4f23-98ba-c6b00ea01761/vobufuvatamurizewo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6839 5176 bytes
SHA-256: 5d6bf053ea789afdf92b2a0e99e721e8e8f4faa098b3c538f667d1b1bdcfa4ea
font_01_sfnt_off000079b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79B5 2552 bytes
SHA-256: e422f7dbf27f1684748226796e45ee50ad44c3483f74eb4ce73ae379e4bbce0f
font_02_sfnt_off000083cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83CC 10684 bytes
SHA-256: 67ce9c489f2aae794c98fddce00c816b5bae8402981ec60756b9ad1cf9405859

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