Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d7ca2563bd4b1bd…

MALICIOUS

PDF

69.9 KB Created: 2021-02-24 08:09:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0ae68e69b2f035f7e1c358c337cc4f51 SHA-1: 9eecd8faed98dedd524dff58b218dd26cf2653cd SHA-256: 1d7ca2563bd4b1bd62eeab88a47980f166e35fc26f34b258d4fd81ee688a2cb5
156 Risk Score

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://bologen.ru/wix?keyword=wills+eye+manual+7th+edition+pdf PDF link annotation
    • https://zolerowiz.weebly.com/uploads/1/3/4/6/134691656/videlojiten.pdfIn PDF document text
    • https://newekozowoni.weebly.com/uploads/1/3/0/7/130738578/5489788.pdfIn PDF document text
    • https://japejezapunat.weebly.com/uploads/1/3/3/9/133999519/9194758.pdfIn PDF document text
    • https://mozesejute.weebly.com/uploads/1/3/1/3/131380505/7924711.pdfIn PDF document text
    • https://wefigofotagovir.weebly.com/uploads/1/3/4/8/134864379/2138074.pdfIn PDF document text
    • https://generixa.weebly.com/uploads/1/3/5/3/135350481/gipojufizopogo-mewazaguge.pdfIn PDF document text
    • https://talapilodegopez.weebly.com/uploads/1/3/0/9/130969507/ridoxojuzexawod.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
    • http://dosekidonara.epizy.com/dilodemebepewi.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/86189122273.pdfIn PDF document text
    • http://gisipusizen.rf.gd/54062415906.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/gowning_qualification_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/tesekugakato.pdfIn PDF document text
    • http://jefebewo.epizy.com/handwriting_sentences_practice_sheets.pdfIn PDF document text
    • http://fukorow.epizy.com/how_to_open_top_of_speed_queen_dryer.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/pitovesamovajivefev.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_off0000c7fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7FE 5260 bytes
SHA-256: d83299e57ad10373f4b835561c26808891552b271b43b18f4ddf4305387ecd81
font_01_sfnt_off0000d9ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9CE 10152 bytes
SHA-256: 50656cfe7e50ab7d71fc3f50d5a97a5f65cda5ff366249ec37381331757b794a
font_02_sfnt_off0000fc97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC97 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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