Malicious PDF — malware analysis report

Static analysis result for SHA-256 567ec4456fabb054…

MALICIOUS

PDF

73.6 KB Created: 2021-03-30 17:18:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: ac40a0ce200f1b1001763da367af5b0b SHA-1: 90676e979c04102141930e1bfa2cb0576d768322 SHA-256: 567ec4456fabb054541df8abb418054c50e3ce99946d9533086ecd6905f5c8c6
126 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to disposable domains and employing UTM parameters, strongly suggesting a phishing or link-farming operation. ClamAV and ML classifiers also flagged this PDF as malicious. While no scripts were directly extracted, the PDF structure and embedded URIs indicate an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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 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://gimoguvi.ru/strik?utm_term=finnegans+wake+menu PDF link annotation
    • http://leadtop.co/jamaica_outline_clip_art_of_catxboza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413865/normal_603fbec569020.pdfIn PDF document text
    • http://flipping-car.online/murray_m2510_attachmentsdbzbq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379849/normal_5ff254912ca9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389090/normal_6019c1b2485a6.pdfIn PDF document text
    • http://nesobaka7.xyz/faxividopofgq6z.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481417/normal_600ccfbfba9d5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485166/normal_5ff4031591789.pdfIn PDF document text
    • http://leftoutclub.com/bejesese6rtv3.pdfIn PDF document text
    • http://lapitubemexidi.mywebcommunity.org/data_structures_and_algorithms_books.pdfIn PDF document text
    • http://labifovejes.mypressonline.com/dapenuluketaxokugoporuxi.pdfIn PDF document text
    • http://laithub.pro/krups_beertender_b95xnovm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496818/normal_5ff9ba2facb1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366036/normal_601bee4520b53.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489414/normal_5fcf5fd910e1a.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
    • https://uploads.strikinglycdn.com/files/bcd8f732-f852-4ac7-8d69-4475598352fc/honda_em_5000_sx_generator_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/bulletin_de_salaire_suisse.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/41367007458.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/anime_apk_mod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b70bc83f-1d91-4404-b904-658b649f8d0c/gazifu.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/94015790470.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c02ca697-ecd7-4dab-96ac-b12ca7f072c0/offices_of_records_of_declaration_disbursements_division_national_correspondences_official_records.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/pokemon_red_walkthrough.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_off0000d6d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D6 4680 bytes
SHA-256: 0b064b73ca348ef3380f449f8de610c2bd2f87caa01ff0cf48a6d8a648ae0107
font_01_sfnt_off0000e6b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B4 10864 bytes
SHA-256: 5b6d8b42e48d7b7276bad7a1e620e6b93a13e8a0be8faa11b464dfe315d9c8a0
font_02_sfnt_off00010b42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B42 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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