Malicious PDF — malware analysis report

Static analysis result for SHA-256 09ed1dcc00d5b768…

MALICIOUS

PDF

80.3 KB Created: 2020-11-22 07:28:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e86ec34300bc515807ccfff848e6fee6 SHA-1: 1fa94df546ae7d923fc0952564e2a5b6f774bb79 SHA-256: 09ed1dcc00d5b7683751f7fb35da04a533c97088c4f7877d9015c586b42807ec
156 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a 'PDF_SEO_LINK_FARM' indicating a large number of external links, with one prominent URL being 'https://traffine.ru/123?utm_term=supernatural+john+winchester+returns'. ClamAV also detected the file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0', suggesting a phishing or trojanized document. The presence of embedded URLs and the ML classifier's high confidence further support a malicious intent, likely to redirect users to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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
  • 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://traffine.ru/123?utm_term=supernatural+john+winchester+returns
    • https://cdn-cms.f-static.net/uploads/4386366/normal_5f91bdb143751.pdf
    • https://fulipevaxavu.weebly.com/uploads/1/3/2/6/132695351/6824412.pdf
    • https://cdn-cms.f-static.net/uploads/4427267/normal_5fadea260b82a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/35cfceba-1f54-44f3-b888-9db243d3c52d/77519447705.pdf
    • https://s3.amazonaws.com/godewumazek/special_senses_study_guide.pdf
    • https://s3.amazonaws.com/muvemasoxaji/39007668259.pdf
    • https://s3.amazonaws.com/vexosafugunu/gangstar_rio_city_of_saints_apk_download.pdf
    • https://s3.amazonaws.com/netinuwa/zapewonutax.pdf
    • https://s3.amazonaws.com/nerugiraxura/24610245263.pdf
    • https://s3.amazonaws.com/gelawiweza/append_to_empty_dataframe_pandas.pdf
    • https://s3.amazonaws.com/mubefula/big_bertha_s_grill_reading_pa.pdf
    • https://s3.amazonaws.com/kalanejaxutilif/forensic_report_template_word.pdf
    • https://s3.amazonaws.com/napisakaluja/texas_representative_2020.pdf
    • https://uploads.strikinglycdn.com/files/a145c3e7-0cd2-42ba-be40-c5bdf0521c48/popiwotoj.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f056.bin
a470e37d1bb731af702a3d3d0354d2874660343dff2b4f63ac39ded01d1ebdc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF056 5176 bytes
font_01_sfnt_off000101f1.bin
79c2ffe0104d649c16607e170734f8cff55ad9dc4a412d3528564853e749d48e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101F1 10696 bytes
font_02_sfnt_off00012660.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12660 4324 bytes

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