Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1cfcdf54d2356ff…

MALICIOUS

PDF

78.4 KB Created: 2021-03-07 06:18:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3ffb8f31623ca25d63f070851758cf64 SHA-1: 8a278f4e0f218e0c4455e0580205bb3a0ced7512 SHA-256: d1cfcdf54d2356ffefd1c73affd442c76e81808e146f1cf1e21e0e24ffc761b5
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a link farm with numerous external URLs, suggesting an attempt to direct users to potentially harmful websites. The presence of embedded URLs and the structure of the PDF point towards a phishing or malware distribution campaign.

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://lozipotod.ru/wix?keyword=camp+chef+manual PDF link annotation
    • https://munerojepoges.weebly.com/uploads/1/3/4/0/134042508/jevifajixu_kinixixojop.pdfIn PDF document text
    • https://wivezinafixozut.weebly.com/uploads/1/3/0/9/130969190/eb36af81.pdfIn PDF document text
    • https://cdn.sqhk.co/tugirujozi/cm1K6SJ/fusipunotisavimudogaxusiz.pdfIn PDF document text
    • https://cdn.sqhk.co/disumuneriva/9ijUlP3/farming_simulator_14_mod_apk_iphone.pdfIn PDF document text
    • https://sawonelezaxiso.weebly.com/uploads/1/3/4/5/134588179/5196850.pdfIn PDF document text
    • https://buwenesuxunuga.weebly.com/uploads/1/3/4/8/134883777/42222a56d24.pdfIn PDF document text
    • https://cdn.sqhk.co/wisewuguv/hidhdje/draw_climber_for_pc.pdfIn PDF document text
    • http://tolagipifumer.iblogger.org/zedutejepojeraguj.pdfIn PDF document text
    • https://cdn.sqhk.co/nejajevafode/iaRAIhe/91459614223.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://falufobi.epizy.com/6581886655.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35c61e82-7548-48da-8997-07ca6b73c127/nautilus_smith_machine_nt-cc1_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a21ff44-8892-4a18-a967-6d48f7057e71/54322546419.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4218ffc-8762-4b5b-8076-4a895f645dea/66610737951.pdfIn PDF document text
    • http://genufewewirim.rf.gd/japupabikuxufapuriroxadid.pdfIn PDF document text
    • https://da99f664-88c7-4a27-98aa-0bbcec2e8f57.filesusr.com/ugd/66f3f9_fff5f4bb83a948608ddd48e5a517ca79.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a95da291-e0d6-48ad-ac36-759729d6c3bb/77647971681.pdfIn PDF document text
    • https://c06d174a-caca-4ab2-b5a0-4525cd3135d4.filesusr.com/ugd/856cea_f8f68465145f4cce919ad9c59b8b3caf.pdf?index=trueIn PDF document text
    • http://dumudolaba.epizy.com/huawei_mate_10_android_9_pie.pdfIn PDF document text
    • https://5053e88e-9e18-4719-890c-32a1cca0295d.filesusr.com/ugd/411503_3aca4249a476489bb8e79fe4b1c08e90.pdf?index=trueIn PDF document text
    • https://60f6da8c-824c-4163-aae9-6195f2ac7ed4.filesusr.com/ugd/7f16bd_94c8ee8c1bd042d69540a3356b7d65bd.pdf?index=trueIn PDF document text
    • http://zuxamivim.epizy.com/apocalypto_2_hd_movie_in_tamil.pdfIn PDF document text
    • https://cda84be5-0c54-4c05-8389-97bb004c798d.filesusr.com/ugd/fa9f00_0e2f8632e48742ae8cbfe02a22f206a8.pdf?index=trueIn PDF document text
    • https://ff4d9611-e7ea-45f2-85d3-f0b464ef817f.filesusr.com/ugd/48f461_c1bc9848d37c4b68ac547d29a76a1f22.pdf?index=trueIn 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_off0000f885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF885 4888 bytes
SHA-256: ec6cc2c4714a3bd3591b1127dbeb6aa08f985bb8f68952ff95f74f823160cbd0
font_01_sfnt_off00010905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10905 10428 bytes
SHA-256: aa8c42fe43d67b1d5713ce10ada9f0bf28bcd9823ba09bf51d1343e2d09ae3a2