Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb7a03dd1a8e44c5…

MALICIOUS

PDF

68.0 KB Created: 2020-10-26 08:10:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 935799b92268cf90159db6376e1608a4 SHA-1: 19b625fd75042a2acbcb9b666c88f7f465b8553b SHA-256: eb7a03dd1a8e44c579d7d87c405f196f405f38d6afd6868ae7c3832153757220
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous external links, with one critical heuristic identifying a link to known malicious redirector infrastructure. Another heuristic flags the PDF for containing a mass external PDF link farm, suggesting SEO manipulation for malicious purposes. The document body, though heavily obfuscated, contains a URL that aligns with the malicious redirector heuristic, indicating an attempt to direct users to harmful content.

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=qualitrol+118+manual In PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/wigusil.pdfIn PDF document text
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/lifise_kamujojekal_setakafonevawib_leliledud.pdfIn PDF document text
    • https://jaserasozupog.weebly.com/uploads/1/3/1/4/131454215/9710655.pdfIn PDF document text
    • https://pesajupamobe.weebly.com/uploads/1/3/1/6/131607203/woxixiguf_futebeku_jebodifevekunug_rarawopex.pdfIn PDF document text
    • https://babinekisifuve.weebly.com/uploads/1/3/2/6/132696104/rusobivivu_nazotasof.pdfIn PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/d1c69b03ad12c61.pdfIn PDF document text
    • https://murepofolod.weebly.com/uploads/1/3/4/4/134480544/5087525.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407303/normal_5f95ffdccd55f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388289/normal_5f8e956f0243e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381962/normal_5f8fb2b74c6d1.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/ganubifirigevi/morfologia_de_los_cestodos.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/94477113838.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/admiralty_law_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/71365043420.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/auxiliary_verbs_rules.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fabf6ce-1834-4b22-8e04-c6b11dee347a/fipigiparonirofal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3591/7473/files/google_play_app_update_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3071/5288/files/97966118860.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_off0000bf99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF99 4960 bytes
SHA-256: 7b0f17993176ea2c4f8fa9bc09e5c26f6a0243a8b031493fb71dfa093606a811
font_01_sfnt_off0000d060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD060 15088 bytes
SHA-256: 8822234bab594723333c13ea9cf09c842e5e0857fe1d7b88b1d7e31d57b9adb3

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