Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dda587b3d162b43…

MALICIOUS

PDF

77.7 KB Created: 2021-05-31 23:55:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd98533ee1e6a980af4530cfd20ea9af SHA-1: ede8cebc733528c66243f22b9d705b82f2cbbbe0 SHA-256: 2dda587b3d162b434bda054dc1fad233acac7306d57e4093dcb497533415c48b
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, with one prominent link pointing to 'crewmak.ru', suggesting a phishing or scam lure. The document body, though partially corrupted, contains text related to legal matters, which is likely used to disguise the malicious intent of directing users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crewmak.ru/pbw?utm_term=how+to+beat+a+covert+narcissist+in+court
    • https://cdn-cms.f-static.net/uploads/4443810/normal_601a56bf5f808.pdf
    • https://cdn-cms.f-static.net/uploads/4420230/normal_605309ef8608e.pdf
    • https://xulasimij.weebly.com/uploads/1/3/2/8/132814518/007709552b02.pdf
    • https://cdn-cms.f-static.net/uploads/4384160/normal_6055256433ed2.pdf
    • https://cdn-cms.f-static.net/uploads/4369305/normal_6041682b65a04.pdf
    • https://cdn-cms.f-static.net/uploads/4474719/normal_6064bfa7bf2c8.pdf
    • https://static.s123-cdn-static.com/uploads/4485569/normal_5ff47d523dc89.pdf
    • https://cdn-cms.f-static.net/uploads/4473052/normal_602f8a1ede5fc.pdf
    • https://nebofubegifeso.weebly.com/uploads/1/3/1/4/131437549/defeba.pdf
    • https://cdn-cms.f-static.net/uploads/4385207/normal_606b94dfed54d.pdf
    • https://waluxine.weebly.com/uploads/1/3/4/7/134759732/c0390.pdf
    • https://mifavawuzizadax.weebly.com/uploads/1/3/5/9/135977912/pesaxola.pdf
    • https://losebevaxefot.weebly.com/uploads/1/3/5/3/135347065/d1c294.pdf
    • https://cdn-cms.f-static.net/uploads/4479705/normal_604ab8536f632.pdf
    • https://fubediko.weebly.com/uploads/1/3/1/0/131070718/262cfbf25b6fe.pdf
    • https://static.s123-cdn-static-d.com/uploads/4451369/normal_60b2e5d024c1b.pdf
    • https://cdn-cms.f-static.net/uploads/4490920/normal_604646828e7c4.pdf
    • https://joxenunufob.weebly.com/uploads/1/3/1/6/131606789/pavorolovepuk.pdf
    • https://static.s123-cdn-static.com/uploads/4473642/normal_6001c4a8b18a9.pdf
    • https://static.s123-cdn-static.com/uploads/4413575/normal_6006e5d742433.pdf
    • https://static.s123-cdn-static-d.com/uploads/4370533/normal_60b3c4e622da2.pdf
    • https://vawuwoteb.weebly.com/uploads/1/3/0/9/130969488/69e185081b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f6ac0c52-b034-4b35-8c24-696515cef640/how_to_cross_the_border_from_mexico_to_usa_legally.pdf
    • https://uploads.strikinglycdn.com/files/94a0400e-023c-4427-b6e7-8a81882c3d44/daring_greatly_brene_brown_barnes_and_noble.pdf
    • https://uploads.strikinglycdn.com/files/f7e81efb-4915-4195-ab49-13d8dd79ee2a/61006650862.pdf
    • https://uploads.strikinglycdn.com/files/bb1bef0b-163b-488e-b572-34577abbdabd/free_movie_creator_software_for_pc.pdf
    • https://uploads.strikinglycdn.com/files/02c24b08-a069-45be-9f32-4c8b97d54978/que_es_la_biblia_y_los_evangelios.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f36a.bin
2b0b6eea0880b06dab25de59bde9fa11ac5c53d8bc49bad7481050fc243f4ce2
pdf-font-stream PDF embedded font (sfnt) at offset 0xF36A 5012 bytes
font_01_sfnt_off0001049b.bin
b814828ad1f3f95f83906e0bec82fcc3c1c416957e5e4b4fa7e654c93b284715
pdf-font-stream PDF embedded font (sfnt) at offset 0x1049B 10656 bytes