Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a5cb5082b817c2b…

MALICIOUS

PDF

74.8 KB Created: 2020-11-30 03:41:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: a39b238196c551526865bda6c5b3c618 SHA-1: e4f6644771f9d91b3c22f940ef9f5f8e3cb95be9 SHA-256: 7a5cb5082b817c2b776670669a994f55d68a957820b2903de03ec90d65c0d38f
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, many of which point to PDFs hosted on cloud storage services, suggesting a link farm or redirection mechanism. The primary malicious URL identified is 'https://trafficel.ru/strik?utm_term=computer+architecture+interview+questions+and+answers+pdf', which is likely used to redirect users to a phishing or malware distribution site. No scripts were extracted, but the PDF structure and link farm indicate a phishing or credential harvesting attempt.

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://trafficel.ru/strik?utm_term=computer+architecture+interview+questions+and+answers+pdf PDF link annotation
    • https://bomazadoxu.weebly.com/uploads/1/3/4/4/134474586/299882.pdfIn PDF document text
    • https://xinelonaveguv.weebly.com/uploads/1/3/4/6/134606197/wuzovo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467926/normal_5fbf678ba558b.pdfIn PDF document text
    • https://voledobaseju.weebly.com/uploads/1/3/0/9/130969813/3760246.pdfIn PDF document text
    • https://gedolumu.weebly.com/uploads/1/3/4/7/134761272/889967.pdfIn PDF document text
    • https://siravexadobema.weebly.com/uploads/1/3/4/3/134320718/pinux.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/tugabijenovili/76792484266.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/new_telugu_love_feeling_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/list_of_queensryche_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e66052d-740d-4a1a-9ffe-bbe39688d999/picture_of_convergent_boundary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a78bc3b8-93c2-4469-9c26-10bf8d2200ea/free_printable_black_t_shirt_template.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/1332184880.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/vitopatazogawe.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_off0000da0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA0A 5544 bytes
SHA-256: a70543e693500ca426faeb81d16086e8f7bc9e568006941ed0aabd22c0f4dbab
font_01_sfnt_off0000ecd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD0 10348 bytes
SHA-256: 0fa3f4dd3125a95bb785beb1f02176cb15c10df9a0171898e396863529407143
font_02_sfnt_off00011005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11005 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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