Malicious PDF — malware analysis report

Static analysis result for SHA-256 e899c14e13d2f1cd…

MALICIOUS

PDF

77.3 KB Created: 2021-03-01 14:26:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aacfd5be3d85ec51226514b8518a45ab SHA-1: 5148b6b80a8441f75299888488d2171926d7ef7c SHA-256: e899c14e13d2f1cde13bb3febc137017dfd854f67a5139440309cdcde51cbab9
164 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing or SEO link farm attack. It contains numerous external URLs, suggesting an attempt to manipulate search engine results or redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious intent to distribute harmful content or phish users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://golowaki.ru/wix?keyword=modern+carpentry+willis+h+wagner+pdf
    • https://static.s123-cdn-static.com/uploads/4379612/normal_5fe29fcb1c967.pdf
    • https://xawuwotogot.weebly.com/uploads/1/3/2/6/132695388/godirugope.pdf
    • https://cdn.sqhk.co/rijomawonuj/gcgfigJ/download_vitalsource_bookshelf_to.pdf
    • https://cdn.sqhk.co/zurajekiviw/qvgglha/bizajifetijetaj.pdf
    • https://suvewuvasalu.weebly.com/uploads/1/3/4/7/134762181/9742e3a74c9e78.pdf
    • https://cdn.sqhk.co/faruretekiv/SlAUja4/piano_tile_the_music_anime_mod_apk.pdf
    • https://nizifaweneli.weebly.com/uploads/1/3/4/5/134589853/nudezukudawepo.pdf
    • https://wubedalenab.weebly.com/uploads/1/3/1/3/131383767/mibojibi.pdf
    • https://cdn.sqhk.co/boxewemutox/jageij0/fopomode.pdf
    • https://cdn-cms.f-static.net/uploads/4492593/normal_601a2e585f46a.pdf
    • https://cdn.sqhk.co/fabupiguboxa/fgiihgi/mediaf_re_download_games.pdf
    • https://lomameleni.weebly.com/uploads/1/3/4/5/134597964/miwaxet-fafovowoba.pdf
    • https://webutukokixomuw.weebly.com/uploads/1/3/5/3/135317122/revubazirinatasanes.pdf
    • https://cdn-cms.f-static.net/uploads/4443342/normal_600dbfc3a8e95.pdf
    • https://cdn.sqhk.co/goluxewimabu/g6haggk/launch_monitor_for_golf_simulator.pdf
    • https://wojizenufojanog.weebly.com/uploads/1/3/4/7/134724603/3873318.pdf
    • https://cdn-cms.f-static.net/uploads/4366666/normal_60246896ca214.pdf
    • https://static.s123-cdn-static.com/uploads/4418170/normal_6000c1b27a769.pdf
    • https://cdn.sqhk.co/damukowabij/ghiaYxk/berogepuvolu.pdf
    • https://static.s123-cdn-static.com/uploads/4496577/normal_5fe1d079b66c6.pdf
    • https://cdn.sqhk.co/terexugureto/33hc8gc/gangs_of_london_review.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbac.bin
42ea1416ae3117b7c14d0a2870f655b49fe2f91cc2602f43fb21a66c23d12c95		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBAC 5616 bytes
font_01_sfnt_off0000eee8.bin
b748c470cea8dfd6550ea5619e6e614ff5fb7c0329f1f930039a90ff05589e5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE8 10512 bytes
font_02_sfnt_off00011313.bin
0b6d67ed6f7b9ca340f69bc1efbee2cf1faeb02ae856abbfc241c325d1d7b232		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11313 16064 bytes

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