Malicious PDF — malware analysis report

Static analysis result for SHA-256 e616d58a3e79765e…

MALICIOUS

PDF

86.8 KB Created: 2021-01-06 01:49:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 054e8c33a35ab91ddaf0ad9dd2d1ce53 SHA-1: e5f84521a2e38f3af97735c95000f3edc6b090fa SHA-256: e616d58a3e79765ef2cf7deab3cb38eb85e1d3d370bc02be5a4f119a6de5a0b7
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to potentially malicious domains, and is flagged by ClamAV as a phishing trojan. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a tactic to distribute malware or phish for credentials. The ML classifier also strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://trafffe.ru/wb?keyword=bass%20booster%20equalizer%20download%20for%20pc PDF link annotation
    • https://zuwukozoxuwiged.weebly.com/uploads/1/3/4/7/134713444/bf969e47a7b.pdfIn PDF document text
    • https://rogapasutidubu.weebly.com/uploads/1/3/1/4/131438129/3a902.pdfIn PDF document text
    • https://mojipolizu.weebly.com/uploads/1/3/4/3/134318612/9249135.pdfIn PDF document text
    • https://giwedogifuj.weebly.com/uploads/1/3/4/7/134741463/digotowosuvole-bojezow-kunax.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/ce82a3d0-98e7-499b-bddc-504359172b42/12073449235.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/fox_lane_high_school_famous_alumni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffd4e9fd-c721-4faa-9aab-37367543ac62/98564874546.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf7cad1e-b3aa-4305-ab0b-64851b7f95c1/nordictrack_a2550_pro_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/bufikubapivizeli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1dac492-4c43-4f09-9179-325734109dae/82952221680.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/749e4451-37ea-43ee-a31f-c98ca9ad471a/14842888958.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8adac5ea-05ff-4c3e-bc21-f1a197d195f7/14980564782.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/594b9e0e-9dde-45f4-8476-1591a1e3af98/zoxelavarepixute.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBD 6440 bytes
SHA-256: edf517a561ed5132c6c1d5718ac6ff9d870a00e6f43a91762fd168a2279cca75
font_01_sfnt_off0000fcb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB3 5608 bytes
SHA-256: 9623273d81efb6479fe80739831c88658aa39f30179c411ed9633211669e89c0
font_02_sfnt_off00010fe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE3 11488 bytes
SHA-256: e5ae873ada575cca3960b64c79dc102731ba204b4fbf155fb279f727057620a0
font_03_sfnt_off00013744.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13744 16432 bytes
SHA-256: 16c64dcfc75b7ab52b680e7d4ceebd3c396b6526de680038cc7a41ea363ccd45

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