Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b15cd75d9eab288…

MALICIOUS

PDF

80.2 KB Created: 2021-01-14 11:34:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 4ed3fa4cd8b0ed87bcc445f71fb33e49 SHA-1: 4eab20f575257bf2638853e1cd4a0de553f0a904 SHA-256: 6b15cd75d9eab288f26f646ffcd89ad5f39397d1d9f261ecb76e39ce69c73c14
184 Risk Score

Malware Insights

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

This PDF document contains multiple embedded links, with at least one identified as a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to software downloads ('Android windows 10 apk'). The presence of numerous links on disposable hosting further indicates a phishing or malware distribution attempt. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/aws?utm_term=android+windows+10++apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393904/normal_5fc1b2ea0ff88.pdfIn PDF document text
    • https://site-1177196.mozfiles.com/files/1177196/xasivixeg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481424/normal_5fbc1b76f0f1a.pdfIn PDF document text
    • https://cdn.sqhk.co/texojijoraso/QNTicvG/36567066149.pdfIn PDF document text
    • https://site-1179301.mozfiles.com/files/1179301/ranew.pdfIn PDF document text
    • https://site-1083772.mozfiles.com/files/1083772/hill_racing_pvp_hack_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/zixemoliz/jfrfB9J/great_white_shark_sightings_world_map.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426687/normal_5ff9fdf419196.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370270/normal_5f880969484a4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406787/normal_5fdee61ccf89c.pdfIn PDF document text
    • https://site-1166042.mozfiles.com/files/1166042/the_crowd_gustave_le_bon.pdfIn PDF document text
    • https://site-1084247.mozfiles.com/files/1084247/planet_ion_thrusters.pdfIn PDF document text
    • https://movireralu.weebly.com/uploads/1/3/4/8/134879142/4923442.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
    • 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA13 4848 bytes
SHA-256: 956cacbfb1d769b72837b61483ea1c180c1f3ffaec81f6279569173023158f9d
font_01_sfnt_off0000ea98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA98 10548 bytes
SHA-256: e5d3dddbe65c4409726839d9625a761e5e44e76372d723c9ff20a5a90947e104
font_02_sfnt_off00010e8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E8B 16608 bytes
SHA-256: 15fe385bc2cee22d08f2f7db6d1a4c351739d2ccdb2f3dd04fd20c5f15468b3d
font_03_sfnt_off00012558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12558 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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