Malicious PDF — malware analysis report

Static analysis result for SHA-256 07ec20a9cc00c383…

MALICIOUS

PDF

76.2 KB Created: 2021-05-18 15:41:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 0592a275107d70095a5108bec27dddf2 SHA-1: 019a830af5b76ee9c726652b2e6542bfb540130b SHA-256: 07ec20a9cc00c3835bb990eef3ac55fc41efea1e74c093739200aa1eb08819b5
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, indicating it functions as a link farm. Several heuristics and the ML classifier flagged this PDF as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The primary URL, https://jumiwimov.ru/wb?keyword=infinity%20gauntlet%20snap, suggests a potential lure or SEO manipulation tactic. The document's structure and the presence of numerous external links point towards an attempt to distribute or redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jumiwimov.ru/wb?keyword=infinity%20gauntlet%20snap PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4382948/normal_5fcb41bb99396.pdfIn PDF document text
    • http://befemuvejizu.22web.org/how_to_do_drug_calculations_made_easy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485329/normal_6035773016fb3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476270/normal_60076292ce134.pdfIn PDF document text
    • https://gatojodegapov.weebly.com/uploads/1/3/1/6/131637656/nupod_kakasaxinulure_wizib_wedizo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416653/normal_603a4014635d4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467298/normal_6000e8e5a1aff.pdfIn PDF document text
    • https://renugukid.weebly.com/uploads/1/3/0/9/130969315/rinoran_lamogeboxivog_zunapevavaz.pdfIn PDF document text
    • https://gavebinakufir.weebly.com/uploads/1/3/2/3/132302735/6547681.pdfIn PDF document text
    • https://rilawexiretik.weebly.com/uploads/1/3/4/2/134267086/5883850.pdfIn PDF document text
    • http://piguzipudoval.iblogger.org/whirlpool_gold_series_oven_owner_s_manual.pdfIn PDF document text
    • https://guretaximijogu.weebly.com/uploads/1/3/0/7/130739376/simujasajode.pdfIn PDF document text
    • https://jezipupokegem.weebly.com/uploads/1/3/4/0/134042816/490936.pdfIn PDF document text
    • https://vawovuwowoxug.weebly.com/uploads/1/3/4/0/134040368/8225274.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dac9bdb-67a1-43da-960b-83b1a6be653a/left_handed_crochet_patterns_youtube.pdfIn PDF document text
    • http://pejonoma.epizy.com/phylum_rotifera_characteristics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d11f278-4e2f-4ce0-a140-3014ca15ab17/99701760262.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad6b11db-65e2-46dd-a47b-c3efeb80a304/theseus_and_the_minotaur_sequencing_pictures.pdfIn PDF document text
    • http://moxododokojuke.epizy.com/toretode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a90adfa-73d0-4a9f-9660-a52c77ac13d8/dimoxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6ba6e19-682f-467f-8f2f-30267e6468cd/character_analysis_of_sanger_rainsford.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9ecc52d-de42-4322-9298-2e528978ea5c/93623973547.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc2f8b25-6483-469a-8a7d-7e75c010f5e3/why_is_my_lasko_fan_remote_not_working.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFB 5012 bytes
SHA-256: e7697e87e8e089a66e08fc5207268be901b8b6bf1061028490e08220783df7db
font_01_sfnt_off0000ff35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF35 10744 bytes
SHA-256: cd98c74c2d18563ea2ac6384062852f22f26833ca5626d9bf99a1a1a96cce84f