Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c9909164281afc7…

MALICIOUS

PDF

100.5 KB Created: 2020-12-21 14:42:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 1273975f77d37e76f30eb8e9571642ae SHA-1: 25fe6ed54f1f039d173199545c42fbde84d581cf SHA-256: 8c9909164281afc75400e4f5a3d2611224674bde01ede4c845574226466891f9
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating they lead to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Destruction trainer follower skyrim'. The presence of numerous external links, including a link farm, suggests an attempt to drive traffic to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://traffine.ru/123?utm_term=destruction+trainer+follower+skyrim In PDF document text
    • https://malolikekex.weebly.com/uploads/1/3/4/7/134718462/8595216.pdfIn PDF document text
    • https://jugoruzaja.weebly.com/uploads/1/3/1/4/131407370/takazo_votamavedeg.pdfIn PDF document text
    • https://xivilikowigonun.weebly.com/uploads/1/3/0/8/130813923/3955ec13032b9.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/c19e94e8-90a4-4bee-8b00-db5b05183085/86718553945.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2601b841-dd9e-4f09-8a84-4ae22212096b/78206682609.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0de27085bf90c0efce9ba/t/5fc134faeaf37e3b64c7b88d/1606497531064/tezulej.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/noun_modifiers_exercises_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7615f54-0f62-4be2-a5b7-5ceea5a203ac/resilvering_a_mirror_diy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00fe5986-b374-4a07-9c70-b99f9dffaf7b/larekufiwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/739f8a84-9f2c-4ed7-b305-a8c82a911a27/xumolisipisamugisisiju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12a1ab2c-1e55-403d-8d4f-113f895dfd6e/sequences_and_series_word_problems_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/vurogilozekafobukeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97877a2d-0af0-4859-9b7b-063f9ff55c35/cerwin_vega_d9_craigslist.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000149b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149B3 5284 bytes
SHA-256: 247d83b4aeb8ac7aea0a2f32c5de1e343b6bdfc6b8c377adafe758028b999bd3
font_01_sfnt_off00015bb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BB8 12736 bytes
SHA-256: b3087b7cc3bbc03dfef53b565c9ac920c5d1e818ff218177619a18a359919e15

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