Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff3376c81aec9a03…

MALICIOUS

PDF

108.7 KB Created: 2021-06-06 04:40:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: d6beb2bce3983c26bab17c6058fdf703 SHA-1: ce748315d7e2a258de956afa3f7f64a680a5fca9 SHA-256: ff3376c81aec9a0388a32bbcdf45bdbc1b7f1660bde8fce0094d112751ba6b48
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to link farms hosted on disposable domains, suggesting an attempt to obscure the ultimate malicious destination. The document body, though heavily obfuscated, appears to be a lure related to a '2002 yamaha banshee owners manual'. No scripts were extracted, but the overall structure and URL distribution are indicative of a phishing or redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://philabc.ru/pbw?utm_term=2002+yamaha+banshee+owners+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4498645/normal_60581616ea592.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448124/normal_602cf4859fa38.pdfIn PDF document text
    • https://majojolug.weebly.com/uploads/1/3/4/5/134595566/1813818.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456116/normal_5ffe999eb4efe.pdfIn PDF document text
    • https://wewodagib.weebly.com/uploads/1/3/4/2/134266566/wofagosobuxifi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469634/normal_5fef71a0f0904.pdfIn PDF document text
    • https://panulozeti.weebly.com/uploads/1/3/5/3/135351273/5724c04329a6a7.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4464996/normal_60b44e783cf1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488116/normal_5fdb8be39f82c.pdfIn PDF document text
    • https://vavixama.weebly.com/uploads/1/3/4/4/134471840/2243718.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367680/normal_5fdb748547534.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://dawijunegolo.pbworks.com/f/54113063558.pdfIn PDF document text
    • http://ravowibosu.pbworks.com/f/suvebabenomid.pdfIn PDF document text
    • http://sutodoromar.pbworks.com/f/nebimepenofofewos.pdfIn PDF document text
    • http://zemenifinabe.pbworks.com/w/file/fetch/144686217/27771396430.pdfIn PDF document text
    • http://mudowomuxexo.pbworks.com/w/file/fetch/144424554/gasavoje.pdfIn PDF document text
    • http://funesut.pbworks.com/w/file/fetch/144633636/how_many_magic_tree_house_books_are_there_2021.pdfIn PDF document text
    • http://didaneguk.pbworks.com/f/wipobogofutamuxelulunebip.pdfIn PDF document text
    • http://zufumegi.pbworks.com/w/file/fetch/144423531/vilixeloserovu.pdfIn PDF document text
    • http://kevuxezedila.pbworks.com/w/file/fetch/144606090/tere_bin_nahi_jeena_mar_jana_dholna_song_ringtone.pdfIn PDF document text
    • http://wepadigisita.pbworks.com/f/vebefenirolijogaxa.pdfIn PDF document text
    • http://zekodunu.pbworks.com/f/17413728631.pdfIn PDF document text
    • http://lulatigono.pbworks.com/w/file/fetch/144534627/83689306859.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015efc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EFC 5192 bytes
SHA-256: 9fb93cf5b7bb2f0c67c5d27a781683e843be966cdbaac30b67b641992f9a15ba
font_01_sfnt_off00017073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17073 11444 bytes
SHA-256: 4d7c2f8a4e3feef4bbb97c1f49d4cd4da7c5725bb547fe6d3353cdff5ec53fe0
font_02_sfnt_off00019778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19778 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378