Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfd08ea22f66e8e8…

MALICIOUS

PDF

100.5 KB Created: 2021-06-10 16:28:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 41be326cdf21e6c28baa13856d8e247d SHA-1: 053fb1bd1c5e65862249ed32b84f40178ebf8e9e SHA-256: dfd08ea22f66e8e8dba4a15d39300918a80c23017691dad6b90a61ed72f981fa
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a significant number of external links, with many pointing to disposable hosting, suggesting a link farm or redirection scheme. The presence of the URL 'https://vilenefex.ru/123?utm_term=raja+babu+film+song+bhojpuri' is a primary indicator of a potential phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9904

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://vilenefex.ru/123?utm_term=raja+babu+film+song+bhojpuri PDF link annotation
    • https://gixejeti.weebly.com/uploads/1/3/4/3/134326891/2848667.pdfIn PDF document text
    • https://xamalebudeke.weebly.com/uploads/1/3/4/3/134326767/vojamapelavuni.pdfIn PDF document text
    • https://nunogekir.weebly.com/uploads/1/3/4/5/134597520/3758123.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477162/normal_5fdbbc0f697f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374518/normal_601295b79587b.pdfIn PDF document text
    • https://nanukofufo.weebly.com/uploads/1/3/7/5/137516761/jinoje_palajemo_temekakerumugo_rowimamir.pdfIn PDF document text
    • https://vonodasanex.weebly.com/uploads/1/3/4/5/134503659/givatov.pdfIn PDF document text
    • https://guvijubeb.weebly.com/uploads/1/3/5/3/135318684/7976998.pdfIn PDF document text
    • https://figiroxofidun.weebly.com/uploads/1/3/0/7/130740151/a1dd99.pdfIn PDF document text
    • https://bopexetijajab.weebly.com/uploads/1/3/1/4/131411078/wagesosowopotop-rudofimetowufu-nizogu-rewaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462056/normal_6011d63f19763.pdfIn PDF document text
    • https://kosemezaped.weebly.com/uploads/1/3/4/7/134711049/5419675.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458144/normal_6008d0848af72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462730/normal_602501d114686.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://legalugo.pbworks.com/w/file/fetch/145044120/ramapekivogisiwab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb185c92-667c-4b40-9ba0-6bd58b9421e0/whirlpool_refrigerator_customer_care_number_mumbai.pdfIn PDF document text
    • http://wusagem.pbworks.com/w/file/fetch/145054575/harry_potter_and_deathly_hallows_book_download.pdfIn PDF document text
    • http://wasazejis.pbworks.com/f/47806962577.pdfIn PDF document text
    • http://kevuxezedila.pbworks.com/w/file/fetch/144736182/61757006320.pdfIn PDF document text
    • http://jesababa.pbworks.com/w/file/fetch/144414516/97410460685.pdfIn PDF document text
    • http://jiboduxoguv.pbworks.com/f/jogipalotulufawinomup.pdfIn PDF document text
    • http://papoxuva.pbworks.com/f/trigonometry_the_law_of_sines_worksheet_answer_key.pdfIn PDF document text
    • http://mutoteja.pbworks.com/w/file/fetch/144503346/literary_devices_in_to_kill_a_mockingbird_chapter_13.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43a68e3a-68ae-4844-bfc6-d6dd5fef7f5d/divipar.pdfIn PDF document text
    • http://vulazojab.pbworks.com/f/how_to_reset_fujitsu_mini_split.pdfIn PDF document text
    • http://wuxikadafi.pbworks.com/w/file/fetch/145007868/nebagokidabe.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11053 5536 bytes
SHA-256: 3b2f48a4a18b22b9221069ecc630aa0a911d37deb0e20d30c06bc360ac0f7af0
font_01_sfnt_off00012307.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12307 3720 bytes
SHA-256: d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281
font_02_sfnt_off00012e6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E6B 11000 bytes
SHA-256: ab4021c2cadb0a1387be069c7593e9c1e5c1290bc03e763a535f15c83a7b6365
font_03_sfnt_off00015421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15421 15524 bytes
SHA-256: 20e466b0fabb450ed6293ebab52d7902d9ab87ec2368453b43439558e855fd04