Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc6e1783934bb79e…

MALICIOUS

PDF

72.6 KB Created: 2021-03-21 21:41:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a633a9f21220f0d212e08a1387f9043f SHA-1: 1773f5a5bcea7bbaf51280c0d86ed19ceccd963d SHA-256: fc6e1783934bb79e987688fb75daa38783f53c1b836a02d33480152ede684906
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, identified as a link farm, suggesting a malicious intent to redirect users to potentially harmful websites. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan. While no scripts were directly extracted, the PDF structure itself facilitates the attack by hosting these numerous URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/wix?keyword=bissell+proheat+pet+belt+replacement
    • https://cdn.sqhk.co/wirowanorax/IATgiia/lovadifiwafisarepafo.pdf
    • https://cdn.sqhk.co/jugomuzuteb/f35X1TN/bricks_breaker_crush_quest_level_75.pdf
    • https://cdn.sqhk.co/mezadisedud/ehficve/legacy_golf_club_las_vegas_wedding.pdf
    • https://zakogekumepaxu.weebly.com/uploads/1/3/4/5/134598029/saxofosij-bumijavon.pdf
    • https://fepobiwebefu.weebly.com/uploads/1/3/4/5/134592484/5051b09b.pdf
    • https://jarosebat.weebly.com/uploads/1/3/4/6/134695718/paluxiludo.pdf
    • https://munopufunorari.weebly.com/uploads/1/3/4/8/134881547/kavamolikexadak_vunagunejozeti_fakapanetupir.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a562c325-1a91-4eb0-aef0-eaeb16e4c523/kivokemijemesuzikuvo.pdf
    • https://df1882fa-13c5-42f1-8438-577935b594b9.filesusr.com/ugd/91932b_7ae9e0cbd0b549619587b6156955c27b.pdf?index=true
    • https://76ed6b59-b034-43ac-b949-e1c08f76e3cb.filesusr.com/ugd/ee6100_370f8690f54e40c9a58767520f66fa53.pdf?index=true
    • https://bcbc83ff-a82b-4234-bf1d-c69e8cae54d5.filesusr.com/ugd/057c82_3c02ab087bf64ae7823db470866d4553.pdf?index=true
    • https://7f3356c1-ec1f-498a-9d41-5b36c14d87b7.filesusr.com/ugd/98d33d_d7d1d6891cec494f86a8d043ded4ead1.pdf?index=true
    • https://uploads.strikinglycdn.com/files/51784521-5bf0-4406-862e-0815fbb95305/how_to_make_drum_beats_on_logic_pro_x.pdf
    • https://uploads.strikinglycdn.com/files/9e6618c4-8980-4f47-891e-dc1684ba1aea/fetowuboma.pdf
    • https://36ba0bd5-485c-4bd5-924f-6a5e18dcb854.filesusr.com/ugd/96419b_0b54b521df45439b9601b3e43319234c.pdf?index=true
    • https://0dd0cd87-80d3-4eb5-b9c6-73c43c3a6fca.filesusr.com/ugd/f0b6b3_d187d52850fd4cdbbdfaa63c77736387.pdf?index=true
    • https://uploads.strikinglycdn.com/files/0d3716be-9107-45ae-8a6e-ac83dc6f4e1e/aspire_cf_vv_battery_not_charging.pdf
    • https://1ce8651a-bfbb-4b9a-b1bf-24b3b574775a.filesusr.com/ugd/ac72e0_7bba2ee592de42eab11e020461c1ce52.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ceb3ec84-2ca0-4f4f-accf-a30d4346d06b/how_can_i_learn_basic_english_conversation.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd12.bin
2ab9755140bcec6822454df01efe2d36b4f3189c631a268ab01b58a290b0b019		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD12 5360 bytes
font_01_sfnt_off0000ef1f.bin
a4e032c2358086e89394f62c1f921735995fe6dcad33d2ecc2122a31b4cce011		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1F 10720 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.