Malicious PDF — malware analysis report

Static analysis result for SHA-256 07fe67de2333d628…

MALICIOUS

PDF

75.1 KB Created: 2021-04-05 21:53:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5715c75f2981ea3a9786c02fecb581d SHA-1: ebf833b6c95b415858a63d2bdfe0c8c9a2158a4b SHA-256: 07fe67de2333d6283700926d759ad0aa90ae5ee9209f62c9cb304e5823a09c7b
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, forming a link farm designed to direct users to other malicious PDF files. The primary URL suggests a lure related to 'elements of design worksheet answers'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://resalured.ru/wix?keyword=elements+of+design+worksheet+answers
    • https://cdn.sqhk.co/xaranoraf/VjdgeKL/catfish_near_me_drive_thru.pdf
    • http://kernig.online/cisco_sg300-10sfp_10-port_gigabit_managed_sfp_switchct3e5.pdf
    • https://cdn.sqhk.co/getabemuto/ehgMdUn/66505562994.pdf
    • https://rosowimibezot.weebly.com/uploads/1/3/5/3/135392622/mimumoboli_kizuguseto.pdf
    • https://webeboxux.weebly.com/uploads/1/3/4/4/134493090/jaxokozekakuno.pdf
    • https://rofikilidoxomuk.weebly.com/uploads/1/3/4/0/134017179/gonojezafom.pdf
    • https://nujetamewude.weebly.com/uploads/1/3/4/8/134881912/fufugemofomijeludom.pdf
    • http://distornyup.site/how_do_you_calculate_half_life_in_physicsnb397.pdf
    • https://cdn.sqhk.co/nudofarus/jZEJD4Z/planescape_torment_endings_wiki.pdf
    • https://raxeruzuk.weebly.com/uploads/1/3/4/7/134743740/zarazefub_niresu_xapogebajavam_gusinivoduti.pdf
    • https://cdn.sqhk.co/fasotaluvose/hSYBbIi/amc_30_mesquite_movie_times.pdf
    • https://cdn.sqhk.co/guxifunuris/lijWgii/51926743889.pdf
    • https://jivetigaforivuj.weebly.com/uploads/1/3/4/3/134350389/fc0cdec8.pdf
    • https://cdn.sqhk.co/sivefuxonix/SHjegea/kejosakasodazed.pdf
    • https://kutobuxuvesoga.weebly.com/uploads/1/3/0/7/130740510/xitegusilaloxuf.pdf
    • https://cdn.sqhk.co/xudevekelefe/tSRZjee/ejen_ali_emergency_mod_apk_download.pdf
    • https://cdn.sqhk.co/sinemajud/iZsdggP/slice_pizza_delivery_near_you.pdf
    • https://rokipidofavum.weebly.com/uploads/1/3/4/0/134042790/2bc70ba.pdf
    • https://cdn.sqhk.co/vumusokutil/dHOjijb/32_east_front_street_trenton_nj.pdf
    • https://cdn.sqhk.co/lexaxemiji/bIRxVgh/davuziwuferopapudawo.pdf
    • https://lalevajapogos.weebly.com/uploads/1/3/0/8/130874146/5912866.pdf
    • https://fugakesuj.weebly.com/uploads/1/3/0/7/130776648/6075730.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/besafefaf/robin_hood_imdb_parents_guide.pdf
    • https://s3.amazonaws.com/xukirizugukugi/kasurojowoxokunira.pdf
    • https://s3.amazonaws.com/pujirageg/araldite_2015-_1_datasheet.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e74b.bin
028a5893d60fccdc54d7f6856d6745ba32472dba23033c2fc5701c7124a0a53f
pdf-font-stream PDF embedded font (sfnt) at offset 0xE74B 5432 bytes
font_01_sfnt_off0000f9ac.bin
1e645465a796719e12279553805bc8bca220ea98b6ffe7b7cb1c110729f4f47e
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AC 10904 bytes