Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a2d6b6163a6cb1b…

MALICIOUS

PDF

75.2 KB Created: 2020-12-19 07:04:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: c95d682af8a0d92d8549383f69ecbd57 SHA-1: 15be87fd861ac76cf5ce16d59c30d1af7ecc34f3 SHA-256: 1a2d6b6163a6cb1bbe2a864ccfdfbbebb948ff6a7909ba159da669d61731d768
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' pointing to a suspicious URL. ClamAV and an ML classifier also flagged the file as malicious, specifically as a phishing trojan. The presence of embedded URLs and the overall structure suggest an attempt to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://traffset.ru/123?utm_term=liftmaster+1%252F3+hp+security+%252B+manual PDF link annotation
    • https://pamuvomamutafa.weebly.com/uploads/1/3/4/3/134305197/rinafafukajixaxixe.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/75032054-b26b-4c44-a1db-a5f1d2da69ad/jebugugis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aedfadef-0787-4a9e-b218-9563d523c842/faxisopuxugiwitiji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54e5faf6-0499-4507-b25b-c671e54e5069/89313335634.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75986177-7060-4859-8a9e-dc525a2d085e/pemusawabarogitelara.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2c8a366-0d3e-4b39-bddf-e2044a8fc8f6/tozuworimotenodowali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09e2393d-53e5-4f5e-a7eb-dcce7ec8dfdc/seed_diversity_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b47ff3e8-674d-40c0-a85e-e4503f2c1bd9/zakezugefufixipewisigonev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1274d541-de18-4fcd-bf50-1508f5cbe6ee/basuxikavadomoporumiva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f018e7d1-0f82-4d64-884e-44e1a5a59368/dilef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eda8416f-b17a-4851-93fc-29d8cc4d71f1/gafutalakisibivodufinenoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fb5156e-795a-48ef-8f21-8371808b7f9c/national_junior_honor_society.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc8f7688-0978-40a3-b47b-3a4f964ff76b/95984532632.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc581231452f90b7f043f90/t/5fc7f568f6cc385c9ff3bb9a/1606940008980/tofitusumokeganasivevokip.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0baa35687f52b6b804624/t/5fc12b8ee18c5c478e25feec/1606495119620/dometic_thermostat_manual_celsius_to_fahrenheit.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000f60b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF60B 22440 bytes
SHA-256: ddc18955546c7f0239f8bb4752617530a427cab57dc7f04b40318cf397a02208
font_00_sfnt_off0000bdb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDB0 5548 bytes
SHA-256: 440c368224df342743de3ef372b18fe16d1d1e7dfdab1009ebf17fe27cca1d1e
font_01_sfnt_off0000d07f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD07F 11556 bytes
SHA-256: 162d2efabcdfd6be96c34a217108e2ba529c86b478efa2b168d9bfe707bcbf24

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