Malicious PDF — malware analysis report

Static analysis result for SHA-256 18ec3f9a7a785708…

MALICIOUS

PDF

96.9 KB Created: 2020-11-19 05:01:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 02a02aabf448a47337d4ca9b2fafd3b4 SHA-1: 60f7cb3186228e06fc76c2aea1010aa61a52cb14 SHA-256: 18ec3f9a7a7857082f684f7578e50c7fa8ac5a08d0b24fc8cb118209787ca2e2
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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?utm_term=hetalia+spain+x+england+fanfiction In PDF document text
    • https://fosogaji.weebly.com/uploads/1/3/1/4/131455903/4d357e4481e.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/b919b1ed8f.pdfIn PDF document text
    • https://vikuxujawud.weebly.com/uploads/1/3/4/5/134515409/0943df29774b9a.pdfIn PDF document text
    • https://rukazoxet.weebly.com/uploads/1/3/4/0/134040508/zagewopibava-dowawudevu-kebuxevejuve-xoketogipegu.pdfIn PDF document text
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/f30a890.pdfIn PDF document text
    • https://dajurejew.weebly.com/uploads/1/3/4/7/134753869/04671e0.pdfIn PDF document text
    • https://bidovakufizal.weebly.com/uploads/1/3/4/5/134586087/1485957.pdfIn PDF document text
    • https://tiludidiliduw.weebly.com/uploads/1/3/4/3/134385670/4400072.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/voxazedisula/14354903510.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/19555784822.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0711082e-4c45-440f-aa14-5aa747164be6/24113703246.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/godomenetuba.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/chapter_5_developing_through_the_lifespan_answers.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ded7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED7 27428 bytes
SHA-256: 298e82545bed8d9e2c488dfa90ab1ce7fdcf73d49dc059b3ce9eb757a9a553a5
font_01_sfnt_off000132e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132E8 5044 bytes
SHA-256: f5ebb2600786b3d19b213b1099a3ebf382cd764bb36e077151bcf65efb287075
font_02_sfnt_off0001441f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1441F 10720 bytes
SHA-256: 5fdda1dc794cbe86bd5cec7f4a61d94a6fcc378c72c2738b11d0093958a263bd
font_03_sfnt_off00016863.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16863 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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