Malicious PDF — malware analysis report

Static analysis result for SHA-256 203bd7cf3b3df45f…

MALICIOUS

PDF

70.1 KB Created: 2020-12-14 16:14:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80496adaf689685431a60a04a2d2ea16 SHA-1: 794f2a216208a029baff7b4b999c38c18a987aa1 SHA-256: 203bd7cf3b3df45f8bc47f6849b3a08bbe5e7f57df2f6797feab39f36db0d1e8
214 Risk Score

Malware Insights

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

The file was identified as malicious by ClamAV and an ML classifier, and it contains numerous embedded links. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that at least one URL, https://ggtraff.ru/123?utm_term=animal+crossing+city+folk+perfect+town+generator, points to known malicious infrastructure. The PDF_SEO_LINK_FARM heuristic indicates a large number of links, many hosted on weebly.com, suggesting a link farm used for SEO manipulation or phishing. The document body is heavily obfuscated and unreadable, but the presence of these links strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ggtraff.ru/123?utm_term=animal+crossing+city+folk+perfect+town+generator
    • https://tixowofo.weebly.com/uploads/1/3/4/5/134592641/1608e6d8644d.pdf
    • https://cdn-cms.f-static.net/uploads/4380675/normal_5f907eca962e9.pdf
    • https://zigegawemofeza.weebly.com/uploads/1/3/1/4/131406932/d7cf861.pdf
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/4dfe47e7.pdf
    • https://sizukejagu.weebly.com/uploads/1/3/2/6/132681884/zojebadita.pdf
    • https://buranujepexu.weebly.com/uploads/1/3/4/3/134339299/katoj-pemezapow-lekodutituwera.pdf
    • https://cdn-cms.f-static.net/uploads/4387815/normal_5f95edb87fe00.pdf
    • https://nabesoke.weebly.com/uploads/1/3/4/0/134042749/e01f6f3.pdf
    • https://mujonutuxow.weebly.com/uploads/1/3/4/3/134336111/9973662.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fezenur/alkaloid_extraction_from_plants.pdf
    • https://uploads.strikinglycdn.com/files/a6ba63cd-31f5-4eee-bb7e-c173f2a2f3e7/ben_yoruldum_hayat_mp3_indir_boxca.pdf
    • https://s3.amazonaws.com/xomepixo/mla_format_works_cited_example_for_books.pdf
    • https://s3.amazonaws.com/vinivuxo/memusoberawifirufimol.pdf
    • https://s3.amazonaws.com/pizivurapab/bubbly_ukulele_chords.pdf
    • https://s3.amazonaws.com/turip/asian_countries_capitals_and_currencies.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d341.bin
e6c12789472a11afd0c391e26e1ae36cd31e406af9f9f3fb8386e6407a6d30b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD341 5584 bytes
font_01_sfnt_off0000e64a.bin
9c69092292224227fc5d8472af5960a9519eafd15bc0f73f03b5eb44a38c35cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE64A 10780 bytes

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