Malicious PDF — malware analysis report

Static analysis result for SHA-256 076e4461a6c07e13…

MALICIOUS

PDF

78.4 KB Created: 2020-11-11 12:00:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 19a87329417eef5afd630a9c22b5a62e SHA-1: 79f74b5387b9055d722c4f05b7e359a330ce2ed8 SHA-256: 076e4461a6c07e1397f8f62c00ba7722960e683879e7f2c277b385b27e9b99f1
156 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier. It contains a large number of external links, many pointing to benign-looking PDFs, suggesting a link farm or SEO manipulation tactic. One of the primary external links, 'https://trafficel.ru/123?keyword=formulas+de+derivadas+con+ejemplos', is suspicious and likely leads to malicious content or further phishing attempts. No scripts were extracted, but the PDF structure and link farm heuristic indicate a deceptive lure.

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
  • 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://trafficel.ru/123?keyword=formulas+de+derivadas+con+ejemplos PDF link annotation
    • https://wagimudo.weebly.com/uploads/1/3/4/4/134475497/9331792.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/padokoderunej.pdfIn PDF document text
    • https://bopilewe.weebly.com/uploads/1/3/4/5/134523270/repifoj-vakewil-damonujaxuvot-xekizi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fidefofudi/navy_fitrep_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8b7e0f8-ef37-4152-ba97-ba8a7e402b0f/75285873606.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6b18566-ef63-43f0-8774-19e98cc024af/narimarudireres.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fecae9d-1def-452a-8b88-ea809f838fc8/sepufaze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7fe465e-ede2-4656-a8b9-0c39ed0debc1/16_air_assault_brigade_shop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9518744b-55b9-409d-9d44-50dd8cfc6ee3/26687335067.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ccbd2ba-3af2-48eb-b2e2-586846fc074f/bunker_hill_security_digital_executive_safe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6701b80d-f1f2-4169-8e0a-88cb22bad4ee/mafia_1_pc_download_ocean_of_games.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d03b3307-c1d9-4c72-a2f8-769b40d985f3/xopilejomijubav.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_off0000ddea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDEA 5112 bytes
SHA-256: d5d11abea5a45aa63ac8f7da0ca78580ebd77cb92afd74b0f0af694c77dc3755
font_01_sfnt_off0000ef32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF32 15060 bytes
SHA-256: dcb446239fee7bf59cf1e4d8966b8bc3aa1e804474f8f6d5f436459488b08b2b
font_02_sfnt_off00011cfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CFC 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

Open this report in the interactive analyzer, or submit your own file for analysis.