Malicious PDF — malware analysis report

Static analysis result for SHA-256 22706c71d3b1d2a8…

MALICIOUS

PDF

70.6 KB Created: 2021-01-20 01:50:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 94585608fe7d2bca95775aa21eb459b3 SHA-1: fa13b4528176988ffb45d0e93399690f77ab3399 SHA-256: 22706c71d3b1d2a8a6bf11e7478ca217f91698a497ab3b3f789828d3a8121876
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs, with one specifically identified as an external URI pointing to a suspicious domain, suggesting a phishing or malware distribution lure. The document body is heavily obfuscated and unreadable, but the presence of many links and the overall detection profile strongly suggest it's designed to redirect users to malicious content.

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 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://trafficel.ru/wb?keyword=crop%20tops%20jumpsuit%20short%20jacket PDF link annotation
    • https://site-1174202.mozfiles.com/files/1174202/tokujupivuvavele.pdfIn PDF document text
    • https://site-1173508.mozfiles.com/files/1173508/bhagam_bhag_full_movie_mp4_filmywap.pdfIn PDF document text
    • https://samivixawudajan.weebly.com/uploads/1/3/4/6/134634686/6247945.pdfIn PDF document text
    • https://site-1177421.mozfiles.com/files/1177421/gesoxasajemoruwusa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448986/normal_5fb5548fbad83.pdfIn PDF document text
    • https://lemitixodage.weebly.com/uploads/1/3/4/8/134868200/8639336.pdfIn PDF document text
    • https://site-1192291.mozfiles.com/files/1192291/the_chosen_book_series_taran_matharu.pdfIn PDF document text
    • https://zigulowowe.weebly.com/uploads/1/3/1/3/131380415/82dd4283c3.pdfIn PDF document text
    • https://site-1168029.mozfiles.com/files/1168029/kiguvuguxopovaku.pdfIn PDF document text
    • https://site-1168511.mozfiles.com/files/1168511/wilexibokulejamabefubibav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/mastering_metrics_chapter_5.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/wowhead_herbalism_guide_bfa.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/android_listview_image_button_onclick.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_off0000d9d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D5 5188 bytes
SHA-256: 0c2b2837220fa16869c5d880669a0b82986dbaebfa5673e0063b7acd8d9b7b6c
font_01_sfnt_off0000eb49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB49 9716 bytes
SHA-256: be40a2bd180491de853ae3552ea5ba893b905dd5575d897a9e11ce5728828eeb

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