Malicious PDF — malware analysis report

Static analysis result for SHA-256 446d1a99c84bd4d5…

MALICIOUS

PDF

78.9 KB Created: 2021-04-04 22:20:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: c1abdaba00dc2971f762e4aae48b40a8 SHA-1: a7329e1f64da17a88c6c0f1073b7537ce82d7765 SHA-256: 446d1a99c84bd4d5ca11ebcacf3497ec21da9056fbdeedae5f8c011c9fef171d
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains a large number of external links, many of which are hosted on disposable domains, indicating a link farm designed to direct users to potentially malicious sites. The primary URL, https://xezojetit.ru/strik?utm_term=why+does+my+bosch+dishwasher+not+turn+on, is flagged as unknown reputation and likely serves as a lure for phishing or scamming. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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://xezojetit.ru/strik?utm_term=why+does+my+bosch+dishwasher+not+turn+on PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4424029/normal_6055fcbc2ee6d.pdfIn PDF document text
    • https://paxedobopesenun.weebly.com/uploads/1/3/1/3/131398064/7989334.pdfIn PDF document text
    • https://duxupanitazubo.weebly.com/uploads/1/3/0/8/130813094/599564.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453332/normal_606132a9203b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449009/normal_6009b897b30be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403679/normal_606454ed81903.pdfIn PDF document text
    • https://razivizufizide.weebly.com/uploads/1/3/4/5/134525322/3596250.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367903/normal_603e83f048ee3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6b9ff03a-ef48-417a-a14c-919df0f903d0.filesusr.com/ugd/f459ea_6ceae5a1ca3f4d34ac7348df59431b6e.pdf?index=trueIn PDF document text
    • https://9f503c4c-bf14-4dcb-9a7a-68e0e5bb3568.filesusr.com/ugd/8ac1ab_e1c0492abf4442d5af29814e392559f7.pdf?index=trueIn PDF document text
    • https://ddf64d59-5240-4154-9987-17dfc28e22c7.filesusr.com/ugd/cec570_4683152696104657b6c2b604a162edbd.pdf?index=trueIn PDF document text
    • http://vekejuf.atwebpages.com/bifabalaliberesu.pdfIn PDF document text
    • https://c3e810f9-371e-40b9-9a0b-4695a496ec77.filesusr.com/ugd/2c7c49_f7f36cd7087d4999a15ea088c150edf7.pdf?index=trueIn PDF document text
    • https://d6a293f2-6876-493d-91b7-c13182b05023.filesusr.com/ugd/bcaa7e_584c87ed25a04de895e5a27dabe33551.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ed97d5b-0722-4564-b182-f1db08994f42/the_night_before_christmas_movie_cast.pdfIn PDF document text
    • https://0443db59-9f9d-4031-b786-8a5723798135.filesusr.com/ugd/ab62d6_698b6916e6ae4bf19fca47b350934d17.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5557e1fc-6b9a-4ae7-ad57-79cdc1d19600/civilization_and_its_discontents_chapter_3.pdfIn PDF document text
    • https://26c1613e-5d28-4fa3-89cb-3d2c9ab59faf.filesusr.com/ugd/fe83c3_d2f3e5ae35cc4f2188e9a824c696fce0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a607fcc8-5114-4653-b07e-5bb7f18b92dd/rezofipepolafar.pdfIn PDF document text
    • http://jifisuxevizek.myartsonline.com/99022013953.pdfIn PDF document text
    • https://b5b764bc-4fc6-48d7-9a4b-423a4d05f225.filesusr.com/ugd/3f2390_4ba18c280c4641428054d1d88abc1ece.pdf?index=trueIn PDF document text
    • https://063758de-fb2f-4258-809e-b727485bfd5a.filesusr.com/ugd/89cda4_042ac000499a477b919c3905fd985b14.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF443 5496 bytes
SHA-256: 805dc220634e0c01788c6df3b27b449242e05708b026f6d7a8110ae868e7c158
font_01_sfnt_off000106e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E0 10932 bytes
SHA-256: 5cc238445b48b00f5869de68cdc5f416fb9447ca63c2339a82695d3704aa9616

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