Malicious PDF — malware analysis report

Static analysis result for SHA-256 da96c9dc3641e44a…

MALICIOUS

PDF

72.0 KB Created: 2021-03-21 04:23:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 56996cd538609b8470f1d3a1e8ded0af SHA-1: b206c3cbd5bf165e3a7ff17cc2de9bb5209dcc7b SHA-256: da96c9dc3641e44af384471fdd5f51b359a7618421203d5ad14b8574e081fbfa
186 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. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://vilenefex.ru/123?utm_term=ich+guidelines+for+pharmacovigilance+pdf PDF link annotation
    • https://cdn.sqhk.co/vopofuxo/a0jhiac/sonuxi.pdfIn PDF document text
    • https://cdn.sqhk.co/xonipavu/jjfgjXV/mame4droid_0._139_u1_full_rom_set.pdfIn PDF document text
    • https://faboduvo.weebly.com/uploads/1/3/5/3/135343103/27ac59b3.pdfIn PDF document text
    • https://cdn.sqhk.co/fekerepusa/ggrahiM/raregaxubax.pdfIn PDF document text
    • http://zakosemej.mypressonline.com/ballade_to_the_moon_satb.pdfIn PDF document text
    • https://cdn.sqhk.co/naxupowu/eiehihc/wakesurf_mastercraft_x2.pdfIn PDF document text
    • https://jetijejage.weebly.com/uploads/1/3/4/3/134319548/856831e31.pdfIn PDF document text
    • https://warevinigipa.weebly.com/uploads/1/3/4/8/134898994/3777959.pdfIn PDF document text
    • http://zovolexune.sportsontheweb.net/fazisawezosamuwazumusukir.pdfIn PDF document text
    • https://cdn.sqhk.co/busumodofu/jifMmp0/weed_smoking_tracker.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tuwutexo.onlinewebshop.net/one_of_us_is_lying_summary_chapter_20.pdfIn PDF document text
    • https://be8414c4-f2d5-40c6-b8a8-1a5561a1dac7.filesusr.com/ugd/a452ea_cb4d8392998e4dd8b5cc1c0768e3079c.pdf?index=trueIn PDF document text
    • http://dupepasanu.epizy.com/niv_bible_concordance_download.pdfIn PDF document text
    • http://wirodugapilab.epizy.com/pioneer_avic_d3_reset_button.pdfIn PDF document text
    • http://vuzudaru.epizy.com/11838298812.pdfIn PDF document text
    • http://mifotabelimudon.myartsonline.com/tableau_online_training_and_certification.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a08cf694-c0c3-4dcb-826a-2e1fe73e1f56/kubota_bx2200_starting_problems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16d3c51f-0986-4956-aa90-bafaede105e3/widinumig.pdfIn PDF document text
    • https://315736c7-1030-4200-8d24-05c9f4951019.filesusr.com/ugd/d19ca0_1899eb7886d147c8b7dec0018c28bcc3.pdf?index=trueIn PDF document text
    • http://laxuzoto.onlinewebshop.net/30457605566.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_off0000db93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB93 5568 bytes
SHA-256: 48d2f780a65a4b3c54649d645677edbf8161a5bb0991447435b419f74d42adf6
font_01_sfnt_off0000ee63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE63 10600 bytes
SHA-256: 03a7ad83094172caf5bef984db0d3629fc90ec95c021d1ad4776fb94f616f7db

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