Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2fc13805f90d048…

MALICIOUS

PDF

76.1 KB Created: 2021-03-12 13:14:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 31a82a4dea1c684cd2eabdfe443824df SHA-1: 65f2d4281bcbb960adec5d5f1bef24e89bb3ce31 SHA-256: d2fc13805f90d048ef1b96be29984a62d32da77c9fa287a43a1dac0b39bb4797
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, indicating a high probability of malicious intent. The heuristics reveal it functions as a link farm, containing numerous external URLs, many of which are hosted on disposable domains or appear to be SEO-manipulated content. The primary malicious URL identified is https://soxebez.ru/award?keyword=cf+moto+500+service+manual+pdf, which is likely used for phishing or to redirect to further malicious content. No scripts were extracted, but the PDF structure itself is designed to facilitate malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://soxebez.ru/award?keyword=cf+moto+500+service+manual+pdf PDF link annotation
    • http://dewisazovuvoxi.mywebcommunity.org/bow_tie_cinemas_trumbull_showtimes.pdfIn PDF document text
    • https://pipokusu.weebly.com/uploads/1/3/3/9/133997176/2821092ac02.pdfIn PDF document text
    • http://kemamibuke.mygamesonline.org/dejutagipafuban.pdfIn PDF document text
    • https://sonujeti.weebly.com/uploads/1/3/0/9/130969686/0fbb1.pdfIn PDF document text
    • https://mutefalififide.weebly.com/uploads/1/3/1/3/131383766/2868736.pdfIn PDF document text
    • https://debegibur.weebly.com/uploads/1/3/4/3/134308456/2111506.pdfIn PDF document text
    • https://memezuwiz.weebly.com/uploads/1/3/4/7/134702577/8bec77c6b7e1a7.pdfIn PDF document text
    • http://polobasopika.mywebcommunity.org/focusrite_scarlett_18i20_gen_2_review.pdfIn PDF document text
    • http://nupesupo.mypressonline.com/amistades_peligrosas_novela.pdfIn PDF document text
    • https://rurujopolobadez.weebly.com/uploads/1/3/4/4/134444805/juzogopidufukuf-ruworex-xejurugarireba.pdfIn PDF document text
    • https://wonulabanasilod.weebly.com/uploads/1/3/1/4/131482851/7573677.pdfIn PDF document text
    • http://peromopativej.mypressonline.com/ipad_mini_keyboard_case_for_sale.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/da5453ef-e213-4aa0-8b8d-4e7d823a2242/xanivizixamivevi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d613b555-584f-4991-9e4b-9b8b44b12540/english_class_101_alisha.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52d0db27-cc33-4372-a953-47108bb152c7/dirt_devil_power_max_upright_vacuum_cleaner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed8fbdb4-21e5-4def-bc26-04e86fabbad4/oracle.sql.timestamp_to_date_java.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e72512b8-c9b1-4aff-a93a-d91dc86a20f7/homelite_3514c_carburetor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/236712a3-e466-4971-85c7-fa9e5b05cfd6/jiforiwapemojogu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49eb21e9-9b30-4a97-ab20-a97637ce3e4b/50352066652.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c3ae9ba-7c5e-453f-9db8-d02c98e6d30b/9718293789.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d607a465-0190-4dca-9a0c-00bae1062023/faux_hawk_gta_5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b016a104-4818-49c9-8b71-5039a4a14fa5/40899105697.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_off0000ee06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE06 5532 bytes
SHA-256: c074f244788ae4583971d93ee3e5ebc28f51555d52502667e0321fee0e83304d
font_01_sfnt_off000100c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C7 10040 bytes
SHA-256: 9704c0a3937496b4dc7360d524cca05d89e706532da98a573f6497d9bb151f25