Malicious PDF — malware analysis report

Static analysis result for SHA-256 c15ec3f9f10c4c2d…

MALICIOUS

PDF

77.4 KB Created: 2021-03-30 01:29:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: bdfa3171ffa06cb05f9c0853cbfc24be SHA-1: c79f9f39b8e97386daf0ed124978963514d26810 SHA-256: c15ec3f9f10c4c2d5f2db0e1e317c2aba5982e80655d66fe7809f494fe44cca7
196 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to SEO-optimized PDF files, suggesting a link farm or phishing campaign. The primary malicious URL identified is 'https://baarspo.ru/award?keyword=mad+crazy+love+line+dance+pdf', which is also flagged as an SEO redirector. ClamAV and ML classifiers also indicate maliciousness, specifically classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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
  • 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.
  • 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://baarspo.ru/award?keyword=mad+crazy+love+line+dance+pdf PDF link annotation
    • https://tovegema.weebly.com/uploads/1/3/4/5/134505564/zaroselilebibofotox.pdfIn PDF document text
    • https://bozuwosumexoxal.weebly.com/uploads/1/3/2/6/132682772/6427563.pdfIn PDF document text
    • https://patewowuxafopon.weebly.com/uploads/1/3/4/5/134595548/6422921.pdfIn PDF document text
    • http://lozhobelir.space/colt_ar-15_model_sp1_serial_numbers4j986.pdfIn PDF document text
    • https://zokolukesowi.weebly.com/uploads/1/3/0/7/130776120/mitutofezita.pdfIn PDF document text
    • https://widuboxizivibib.weebly.com/uploads/1/3/4/3/134315701/kekefimepunelomadaba.pdfIn PDF document text
    • https://tuwukodazoj.weebly.com/uploads/1/3/1/3/131383678/bivijinabofovifalane.pdfIn PDF document text
    • https://nudezodubazez.weebly.com/uploads/1/3/1/1/131164524/c55afa7847681.pdfIn PDF document text
    • http://filmera.ru/walt_whitman_mall_holiday_hours1w7qe.pdfIn PDF document text
    • https://gitapizi.weebly.com/uploads/1/3/2/6/132683136/2831892.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/where_to_get_pantone_paint.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/57656785230.pdfIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/62851480077.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/80707357355.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/nuzamukinoxakawimo.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/heartbreak_high_episode_guide_series_3.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/30090091601.pdfIn PDF document text
    • https://s3.amazonaws.com/nafamaragisek/tobamizurikojifemesujije.pdfIn PDF document text
    • https://s3.amazonaws.com/wifukedot/echo_cs-590-20_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/84940602504.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/34157474888.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/english_speaking_books_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/mokiwosubanuguxotopumawom.pdfIn PDF document text
    • https://s3.amazonaws.com/ropidadegaxut/how_to_replace_carburetor_on_echo_srm-225.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_off0000e41f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE41F 1560 bytes
SHA-256: 71337577fef36e46ce718a09ca2836f03782d5f6ddaf742f46b904026ecd8998
font_01_sfnt_off0000ec10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC10 5188 bytes
SHA-256: 312f4d174ba1d8b58f9169da2b61e546119520bd0ba4f25bce2be1f062bc5ae0
font_02_sfnt_off0000fded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDED 12544 bytes
SHA-256: 662f469b311372c457e97629c2a32744c66030249bd8bb03f4a78a436e9bc556