Malicious PDF — malware analysis report

Static analysis result for SHA-256 542f80244cf053a5…

MALICIOUS

PDF

69.8 KB Created: 2020-11-17 22:53:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: de3914320f8531df31f22599f5f8dff6 SHA-1: 19bf6fc502d28f3da845ba7eb7ef2aedb441e78c SHA-256: 542f80244cf053a59156a7256b39f89df3e28adee6fa87b2c565c99f9c2ad04c
214 Risk Score

Malware Insights

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

This PDF document contains numerous links to external websites, including a known malicious redirector. The document body, though heavily obfuscated, appears to contain keywords related to product reviews, suggesting a lure for phishing or malware distribution. The presence of multiple PDF links and a critical heuristic firing for malicious redirector links indicates a high likelihood of this document being used to direct users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/123?utm_term=magic+chef+microwave+hmm1611st2+reviews In PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/5058540.pdfIn PDF document text
    • https://dekekutema.weebly.com/uploads/1/3/4/4/134440935/b8847279311c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420036/normal_5fa5b59bae1a3.pdfIn PDF document text
    • https://tarirubawapub.weebly.com/uploads/1/3/1/6/131606173/vumesaruxiwag.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/bc77ab22-cac5-480a-be99-2267feaa807e/nuvilulakawezuzikodez.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/goldlink_-_diaspora_zippyshare.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d17bd05-9fa3-4179-9666-9bda985b184a/cities_skylines_trainer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87bbe74d-069e-421f-8693-d037fd289f9b/play_to_win_strategy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0cbd36f-773f-4216-9a99-46ccaa62aa42/82820856913.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21371771-1b87-486a-9b02-b3d4ec4fa270/ap_calculus_ab_2018_free_response_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2de5bac-4661-4eac-b92b-33d19827ce61/letubusoligozev.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/14715985605.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_off0000d1cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1CF 5756 bytes
SHA-256: e4f97e38a896e6580996ded78d28145ed648d0f196ce81fb1ecae3244886cf73
font_01_sfnt_off0000e574.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE574 10812 bytes
SHA-256: d3b179fd1af263b65fc331d77db5846cad44bb6f79adc9c6061ecec3c6aa03c5

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