Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce757709969585fc…

MALICIOUS

PDF

65.6 KB Created: 2021-01-16 12:51:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 88e8b5901d116306eb9a80dbc54ec395 SHA-1: ee60497401834a398edae4aa7c80486a342396b1 SHA-256: ce757709969585fc36066fb33d6627ed84cbfa48c61392d6343a448f5c0f7130
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The ML classifier and ClamAV also flagged the file as malicious, specifically as a phishing trojan. The presence of numerous external PDF links suggests a link farm or a method to distribute further malicious content.

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
  • 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://traffmen.ru/aws?utm_term=ap+euro+saq+answers In PDF document text
    • https://faxojoduso.weebly.com/uploads/1/3/5/3/135351685/nalokofetixap_rubox_rajebuteduz_majubi.pdfIn PDF document text
    • https://warodimaziwini.weebly.com/uploads/1/3/4/6/134611971/kejomoro-jolafa-jepitevoj.pdfIn PDF document text
    • https://kukevukoleguko.weebly.com/uploads/1/3/4/2/134265740/237e8ff7438b.pdfIn PDF document text
    • https://cdn.sqhk.co/numokafas/hgAFaif/bullet_hell_300_mod.pdfIn PDF document text
    • https://tajurasexir.weebly.com/uploads/1/3/1/6/131606020/4021379.pdfIn PDF document text
    • https://cdn.sqhk.co/mejofiwog/ggLjaV9/stay_away_lyrics_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/pivokazi/19ELkor/how_to_sharpen_a_knife_with_stone.pdfIn PDF document text
    • https://cdn.sqhk.co/xinulezebi/d22jagj/logo_quiz_level_6_m.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/tuxalowafokuvo/lovepususelezisagazegarap.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/samulesajelemerekosepe.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/rizomuwediwe.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/48281931439.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/axxess_contact_information.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_off0000ba96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA96 4988 bytes
SHA-256: c72d0bfdbab133f4ec363d0bc8cc1a7f08de5c96d792dc420e8f0b0014592bf7
font_01_sfnt_off0000cba9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA9 2744 bytes
SHA-256: 99ca08574c0f61703d69c95e98248c5d024aef0632fe13605c1c1e389329cf25
font_02_sfnt_off0000d753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD753 10100 bytes
SHA-256: bb9aa91417e73b2170683b41fc222d398084e038233a64b6e65a90ef9415e77c

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