Malicious PDF — malware analysis report

Static analysis result for SHA-256 78de805c5c27f0c6…

MALICIOUS

PDF

77.1 KB Created: 2021-03-04 23:57:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 5b1a409c1393e47cfb380424751997be SHA-1: bde9e420e70c2ebaa1027c1fbeb73ab48a687c17 SHA-256: 78de805c5c27f0c6c1c5670f05a1544fb0b3c8115d27264ce35cd1c14c38fb24
156 Risk Score

Malware Insights

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

The PDF contains a link farm heuristic, indicating it is designed to host numerous external links, likely for SEO manipulation or to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically identified as a phishing trojan. The embedded URL points to a domain associated with phishing activity.

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://resalured.ru/award?keyword=what+are+the+two+types+of+printer+and+its+function PDF link annotation
    • https://pebizenif.weebly.com/uploads/1/3/0/8/130874023/8446112.pdfIn PDF document text
    • https://nasoluludeg.weebly.com/uploads/1/3/4/4/134435301/8411047.pdfIn PDF document text
    • http://muzibatixabu.mypressonline.com/tivuf.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/fedure/ayodhya_tamil_film.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4121a02f-1cbd-44d2-9b1f-f5ca50202a52/resewetufagugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/227da395-5aaf-4bb0-9ac7-96de66e1a21b/motorcycle_repair_near_me_harley.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b7f71dc-b946-4b6f-827f-57474b1030e3/16931379627.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/penavep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c68f7b39-6a8b-418e-94d9-0376ef6fbef9/comcast_xfinity_home_security_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/86366175019.pdfIn PDF document text
    • http://geforagegi.atwebpages.com/taco_bell_bean_and_cheese_burrito_nutrition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a37a66a3-1e14-4397-a69d-0768b3d8e1f3/mezurikejumujitafi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a304ec2f-05fc-4d53-b256-966f6a8cb564/troy_township_wi_zoning_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f304790-2045-4ea4-8e15-8c636ab90b97/median_disposable_income_per_capita_by_country.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/39422503172.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/013ee46f-4d1b-48b9-970f-710a2b85e93c/samsung_dw80f600uts_bottom_door_seal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4906d7ca-5ed0-4cdd-8766-f21a62142901/movig.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/40833628666.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/020c64f8-0c76-4bdc-8e2d-2f6ab7c9b31c/how_truly_radical_was_radical_reconstruction.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_off0000f132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF132 5420 bytes
SHA-256: c6aa3045470b6fb52ab95410c9ba55e258b33cb2b0b399dd9ce5465ba880b30f
font_01_sfnt_off000103b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B8 10136 bytes
SHA-256: 6032d46d5e3efa62d9c2af7d5fd76da5b45cd8351d86bf9cfdb5ab5c741be050

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