Malicious PDF — malware analysis report

Static analysis result for SHA-256 c02ba24a36ecd58e…

MALICIOUS

PDF

74.9 KB Created: 2021-01-04 00:59:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 8d9c9e86bafb6f64c5af4998b00ff3e5 SHA-1: be220fe5304da79807be7c6b772182e2cdacfdaf SHA-256: c02ba24a36ecd58e0437adb12d349dd78216da5917fb28c7daff1b62ce432329
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. The primary URL, 'https://trafffe.ru/aws?utm_term=gw2+griffon+mount+flying+guide', suggests a lure related to a game, likely to direct users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with phishing or SEO spam tactics.

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://trafffe.ru/aws?utm_term=gw2+griffon+mount+flying+guide PDF link annotation
    • https://gepagalegizexu.weebly.com/uploads/1/3/4/4/134478943/panoligojirulamo.pdfIn PDF document text
    • https://faripolugariwel.weebly.com/uploads/1/3/1/4/131453512/984c63d95f63f.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/jfg9Pgh/extreme_off_road_trail_racing.pdfIn PDF document text
    • https://xinulirolome.weebly.com/uploads/1/3/4/5/134599248/jiraf_muvafagubi_lekotav_mabibaxesuv.pdfIn PDF document text
    • https://xizimojagetotom.weebly.com/uploads/1/3/3/9/133997363/zilenor_bovofafinikufe_bawiwevewo.pdfIn PDF document text
    • https://fedofiri.weebly.com/uploads/1/3/2/6/132681193/maxovuxibes_mejox_soden.pdfIn PDF document text
    • https://misajutedatid.weebly.com/uploads/1/3/4/7/134755713/nabujokepujisilef.pdfIn PDF document text
    • https://tatabano.weebly.com/uploads/1/3/4/8/134850833/5eede2d.pdfIn PDF document text
    • https://gorigopaf.weebly.com/uploads/1/3/4/3/134341526/gixuguwotuwudezokap.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/tidigudetefumof/alphabet_tracing_practice_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/2_bit_full_adder_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/timupuwenunixuvajunet.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/accommodation_versus_assimilation.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/jinja_template_string_comparison.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_off0000d9ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9BA 5080 bytes
SHA-256: a26357b8ea4d65efede3c600cfae9c279a78e40187afea13b3ac8af10690d4ed
font_01_sfnt_off0000eb09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB09 11028 bytes
SHA-256: 586927692062dda55ed2853a3b63ed56021e36e8265698b20d37d35e83a88ab7
font_02_sfnt_off00011093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11093 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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