Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c37659bf615c6ce…

MALICIOUS

PDF

81.5 KB Created: 2021-03-09 18:52:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 26ad60725f1363ed487cbf9e7875eb13 SHA-1: 57de5f687aef4e01e0bab78b55f3339803cc44d4 SHA-256: 8c37659bf615c6ce933f9d14bf1f549d3d8dbef0186c049674599b55640cb266
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure and a QR-code lure. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://resalured.ru/123?utm_term=camera+scanner+to+pdf+apk+pure PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4465709/normal_5fdefdd661895.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449187/normal_602c20a58012f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446496/normal_601b6d294c4a0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383703/normal_5fff67fa1770b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474978/normal_5fec932fbad43.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448718/normal_5fed255413f67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491175/normal_6011adeae737e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477658/normal_601d34b9bcd3d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486192/normal_5fc59f2f2c51d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473640/normal_5fe77cf93390f.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/96b68be8-e789-48f8-ad7d-c76d067bfddf/rezoserewozavasamim.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/votadisabep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df51d547-df30-4cce-accb-7a61709eca7d/94757855969.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b36781a0-8cd3-4a5d-9d2d-90b62fc1f1e5/weecke_fenix_2.0_review.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/lagu_cinta_bertepuk_sebelah_tangan_pupus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86298ce8-35c1-48a5-95b6-be34ea5b14ee/kiwuvipewudefezuwam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dc40106-8e0b-4d61-b672-2c93645478e7/insert_flowchart_in_word_2010.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2f9cd50-b111-4ab8-b32d-341a5518cde6/how_to_take_permit_test_online_california.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30d3b248-ae13-4310-b3a6-d1345d07aa4f/sevelusojogus.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6EF 5240 bytes
SHA-256: 364b22b3ac8768220a91edb468537a392cf5596a4992453745ec6e7c9b7915d3
font_01_sfnt_off0000f8ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8AB 12448 bytes
SHA-256: 0137ee81eb52fcc2463100c8b9059502e25a9ffe9968d97a30fcd290dea38469
font_02_sfnt_off0001217c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1217C 16244 bytes
SHA-256: 71b3c70877a07f920118f4c6ca13c2c85d760d9fd49c965fbba6477954a93e74

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