Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e1da3c5993d075d…

MALICIOUS

PDF

69.4 KB Created: 2020-12-21 17:39:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: ea69af7104c32f1b9674ebb0ba0b4cff SHA-1: 612920dbfe464c66e3a0172e34ce457c9bb12713 SHA-256: 7e1da3c5993d075d8ce8fc16bee401c6008907d3519f340caa49bdf29985c934
214 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it redirects to known malicious infrastructure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains text related to 'Bollywood movies' and 'custom firmware', likely serving as a lure to disguise the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gettraff.ru/aws?utm_term=bollywood+movies++mkv+cinemas In PDF document text
    • https://static.s123-cdn-static.com/uploads/4393904/normal_5fddf50c3c6fd.pdfIn PDF document text
    • https://gogiwujuduk.weebly.com/uploads/1/3/4/3/134352159/9ae94646418.pdfIn PDF document text
    • https://babosaka.weebly.com/uploads/1/3/1/3/131379498/5767875.pdfIn PDF document text
    • https://katolafafesol.weebly.com/uploads/1/3/4/4/134479470/pivugawe-pizope-wagen.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8095a208-ab4a-4114-804d-2390bc84d6ef/t95z_plus_custom_firmware.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ec07fab-e06f-4b2f-a537-46b8acf3b8ea/gogimoxumuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68dd86f4-8fbc-4fb7-b10c-667359d3ec17/2002_chevy_impala_engine_diagram_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/agua_de_beber_partition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a14aa6b-aec8-4e25-9584-989205467f16/miles_and_huberman_1994.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/794f9178-ff97-4e9b-bf60-82f0e32d5dab/dijesu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0aa27c8e-7106-4ff7-aeee-a42a38c89c77/94295649126.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_off0000d1f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1F3 5356 bytes
SHA-256: 0a4da01f7712532136d95f2305c4c3ad30359867054c8718a1b49611b210c823
font_01_sfnt_off0000e43b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE43B 10792 bytes
SHA-256: cc6c6a3ec3c90cdce05b123f330fb035684ac0bfdd6fcb398bac37571f0b4e4a

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