Malicious PDF — malware analysis report

Static analysis result for SHA-256 73a41085db7cfec8…

MALICIOUS

PDF

78.3 KB Created: 2021-01-26 01:53:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1c17afab964821216e42dba718baca11 SHA-1: 7e18d2a2974382f940cb4790bc0978aa23c50151 SHA-256: 73a41085db7cfec8aa3f1972473b1616cc43e077fb595d3de0c64eb04feeead7
96 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, specifically flagged as a phishing trojan. It contains an embedded URI pointing to 'trafffi.ru', which is presented as a search result for 'Human ecology meaning in urdu' to deceive the user. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffi.ru/wb?keyword=human%20ecology%20meaning%20in%20urdu PDF link annotation
    • https://cdn.sqhk.co/kuzetuzame/igbiiOK/guess_the_emoji_movie_answers_level_43.pdfIn PDF document text
    • https://cdn.sqhk.co/parabeset/1jjyRib/indoor_creeper_plants_nz.pdfIn PDF document text
    • https://cdn.sqhk.co/kikutajaz/hahdggh/tizagaruzigabugajopalut.pdfIn PDF document text
    • https://cdn.sqhk.co/nogedapuvul/ijfmiff/xovodinufupuruneri.pdfIn PDF document text
    • http://shoop-fg.ru/marasijirugap3dxd.pdfIn PDF document text
    • http://guwodela.iblogger.org/xaminevunurazug.pdfIn PDF document text
    • https://cdn.sqhk.co/xozawimepod/NHZnic1/taxaxozepojimuxuleka.pdfIn PDF document text
    • http://usersdeviceprotectionservice.site/44701453311ub41p.pdfIn PDF document text
    • https://cdn.sqhk.co/sugezigo/hbzJgdO/pepper_potts_armor_iron_man_3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487902/normal_5fd651327486f.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/bibejovixapis/teradegisatamig.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/free_house_music_acapella_s.pdfIn PDF document text
    • http://lilepav.rf.gd/wowatobek.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/empirical_review_on_drug_abuse.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/92282480804.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD867 5144 bytes
SHA-256: 3b6be27d02c480c45a84b811d13c3d461182c217005d43ba883135de760af8ac
font_01_sfnt_off0000e9cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CC 9932 bytes
SHA-256: b5586cec7ac70b48f4203cf0f47c838c0a9903280bc07903868e17d3966c8df7
font_02_sfnt_off00010c22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C22 18896 bytes
SHA-256: 17b7589fc5a360e37c3bcd3d7c56076762d161bb83f5a5b1faced52c37e31046

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