Malicious PDF — malware analysis report

Static analysis result for SHA-256 f413431265c0aaf4…

MALICIOUS

PDF

85.0 KB Created: 2020-11-21 20:41:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 2221274950e3edcca78071f9173650bc SHA-1: 1cb35649e61a7dd699c03f76bcb8742623575a7f SHA-256: f413431265c0aaf4604b1c31f4f49224dd2d43e19fc63e0993fe5941575edf88
244 Risk Score

Malware Insights

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

This PDF file contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the URL 'https://gettraff.ru/123?utm_term=modern+combat+5+apk+download'. The document body, though heavily obfuscated, appears to be a lure related to software downloads. The presence of numerous external PDF links and the detection by ClamAV as 'Pdf.Phishing.Trojan' strongly indicate a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 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.
  • 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://gettraff.ru/123?utm_term=modern+combat+5+apk+download In PDF document text
    • https://juporolo.weebly.com/uploads/1/3/1/3/131380745/3943693.pdfIn PDF document text
    • https://lezaxuvetevomuf.weebly.com/uploads/1/3/4/3/134370754/ruzunelawotelofipuvi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386607/normal_5fa91e4401c54.pdfIn PDF document text
    • https://zobirifojufegot.weebly.com/uploads/1/3/4/3/134374070/2357693.pdfIn PDF document text
    • https://dawugagulinejud.weebly.com/uploads/1/3/4/3/134368664/53cc4f717b5c35.pdfIn PDF document text
    • https://dowikonusinewe.weebly.com/uploads/1/3/4/3/134374018/vapufanemorar_bebal_posorarozesokus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369494/normal_5f8953ea30366.pdfIn PDF document text
    • https://wumunelopilum.weebly.com/uploads/1/3/4/3/134395902/4107587.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/fizaxo/pac-12_school_crossword_clue.pdfIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/mulanazutobabitul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0802ce1e-6b6d-4c6f-ba3f-8d0335ccb93a/fifteen_million_merits_reddit.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE29 6744 bytes
SHA-256: ffeb89eaad713c9717385028f79c9757067aafb2c2382ea8cbab0e6efe35a425
font_01_sfnt_off0000dee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE0 3304 bytes
SHA-256: 8d1ba2dd0056c75adaaacd3493689051324548195f7c525acec76dabf95f1ec6
font_02_sfnt_off0000eaa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA1 5464 bytes
SHA-256: 10ba9eefb0743c6a93e0dbbc300e9c30d302311037f280a13a32bb9aa2ee1c7a
font_03_sfnt_off0000fd37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD37 8204 bytes
SHA-256: fdd2e8a830a91613ba58a2943b76c63d14560a72272c116c7dbfe41bcbcdb1c2
font_04_sfnt_off000118b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B2 11108 bytes
SHA-256: ecfddfeef56fd271cb67ee7c01388ed33437f19e693ae067f6c33eb1fee4fa5a
font_05_sfnt_off00013ea0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EA0 1736 bytes
SHA-256: 551918360585b1590efa6fd2a215345b2f702067d151a0e4b48cfa7490b57960