Malicious PDF — malware analysis report

Static analysis result for SHA-256 bddd6e88a556bd97…

MALICIOUS

PDF

66.4 KB Created: 2021-02-27 04:46:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: fc7678a9574320eeeedb4a3cdce99295 SHA-1: 5211c46b8b80a4f55fe518a1a28ff3e43443da58 SHA-256: bddd6e88a556bd97931a2169b17a2d960059256610a753574edbca599c7e409d
126 Risk Score

Malware Insights

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

The PDF document is classified as malicious by ML and ClamAV, and exhibits characteristics of a link farm. It contains numerous embedded URLs pointing to various domains, suggesting an attempt to redirect users to potentially harmful content. The document's metadata indicates it was generated by wkhtmltopdf, and the body text is heavily obfuscated, but the presence of external URIs and the link farm heuristic strongly suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://pelibifir.ru/123?utm_term=jvc+gr-d240ek+mini+dv+camcorder+manual PDF link annotation
    • http://naturaitalia.space/android_google_maps_simple_exampleu5dio.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472213/normal_6000b1ff8a586.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391634/normal_5fe6d9d71db6f.pdfIn PDF document text
    • http://starkrobotics.org/cuanto_es_1_nanocoulomb9lwbf.pdfIn PDF document text
    • http://letnesil.xyz/android_tv_samsung_40s4g2a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453108/normal_5fcfe6d6b5347.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380701/normal_5fcc994bd4128.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455208/normal_5fdd46f1af208.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470968/normal_602c87e8ce32d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404750/normal_5fea1a09b7f75.pdfIn PDF document text
    • http://zumewidife.mygamesonline.org/roxajapujepipalevugez.pdfIn PDF document text
    • http://jevufoduxixan.22web.org/14883028379.pdfIn PDF document text
    • http://satomupudogoni.22web.org/buradapezawumom.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://weparaxopulo.atwebpages.com/how_much_is_david_beckham_worth.pdfIn PDF document text
    • http://debukigezi.epizy.com/elasticsearch_create_index_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/guide_intrants_agriculture_biologique.pdfIn PDF document text
    • http://mikusadetov.rf.gd/wafapepijofujapagaf.pdfIn PDF document text
    • http://jokosen.atwebpages.com/hp_laserjet_4015n_printer.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/twinkle_twinkle_little_star_chord.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/61644882011.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_off0000c7db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7DB 5588 bytes
SHA-256: 980e4c245af8a7403cd59ef6994b2957da1812274944e58789e2dc8122097756
font_01_sfnt_off0000dadd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDADD 9808 bytes
SHA-256: 1a526a79d40133f0557ba5a0f2bfaef0439fb32cf8d8071cad8ff12310ca0282

Open this report in the interactive analyzer, or submit your own file for analysis.