Malicious PDF — malware analysis report

Static analysis result for SHA-256 a96f089421e1b018…

MALICIOUS

PDF

63.8 KB Created: 2020-12-25 05:51:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 85c64ad6980fb2338bc16a6b3077d3e0 SHA-1: 27d52ad4fd135491da068077b9366f598a7569d9 SHA-256: a96f089421e1b018b4ee4cf39f3cf4068ff8dd5f1ce7eff0ae9fb8b370eaa445
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains text related to 'informasi gangguan atb batam' which is likely a lure to direct users to malicious or spam content hosted on the numerous external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffi.ru/aws?utm_term=informasi+gangguan+atb+batam PDF link annotation
    • https://lopamazaveseku.weebly.com/uploads/1/3/4/6/134643240/12f24170d48.pdfIn PDF document text
    • https://potuvomominoneb.weebly.com/uploads/1/3/2/6/132683031/rufipodoj.pdfIn PDF document text
    • https://xitorudabetibom.weebly.com/uploads/1/3/1/8/131856365/tinopenegove-duxurosunivot-tumexefatopux.pdfIn PDF document text
    • https://cdn.sqhk.co/guzunilepin/ONNKBha/7921635713.pdfIn PDF document text
    • https://nigafabap.weebly.com/uploads/1/3/4/3/134377596/rirasato_rixezonujifi_mosalukugepiw.pdfIn PDF document text
    • https://kaseloguxov.weebly.com/uploads/1/3/1/4/131406527/23565d720e3d.pdfIn PDF document text
    • https://folesatabija.weebly.com/uploads/1/3/4/4/134441350/2205753.pdfIn PDF document text
    • https://xikoroto.weebly.com/uploads/1/3/4/3/134338579/7150276.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxisilogok/aL7jg7J/14549314472.pdfIn PDF document text
    • https://nesipemuwazona.weebly.com/uploads/1/3/4/8/134881126/pexisogazetet-tigewoxukin.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/xixonu/canada_food_guide_dinner_plate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33ee6b52-3649-42b7-a599-0ed45b00c2c1/40814621021.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_off0000beba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEBA 5132 bytes
SHA-256: 16a24fe77f50ccff40cbbd21236e6c8a84be06c35346552d9e03cd0b480c1c6b
font_01_sfnt_off0000d018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD018 10200 bytes
SHA-256: 4cb1ce81a9c5ccaf461d768b48b0eda1142eb8a82771dce69ec9a04f4422b379

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