Malicious PDF — malware analysis report

Static analysis result for SHA-256 acbb6b4f02d27148…

MALICIOUS

PDF

78.2 KB Created: 2021-03-08 04:34:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9220345e61d50839f866211e0de3654b SHA-1: 9231b428514b9327eb68490835a4f3b6d700f51b SHA-256: acbb6b4f02d27148c1698c1256ffbfa4840bafa754b9adc4458c80d0c2f0fd66
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

Heuristics 5

  • 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 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://crophysi.ru/aws?utm_term=irobot+675+vs+676 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4426407/normal_5fe0d316dc495.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426277/normal_5ff38e9200051.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489993/normal_6005427e8022b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446038/normal_5fedb9a01a99d.pdfIn PDF document text
    • http://modebedunizux.iblogger.org/gejusodazeme.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458829/normal_60376a375e1cd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xuperag.epizy.com/adobe_reader_10_windows_xp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bffe897f-941e-48b6-a135-fd297f32425b/how_to_change_password_on_lorex_nvr.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41044279-bea7-42f6-a957-62f32f58cf3c/73285807847.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/033a190c-d1bd-48c6-abaf-a97568790e36/razukivexef.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/lalomalutemizad.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/zijidelibumuwomuromaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89a03013-0414-4ca7-8ce4-8798ab18033f/cool_things_to_draw_for_beginners_step_by_step.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08473789-c014-4074-9cb5-0c846bc1b099/23850813389.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cdf3fd0-5677-472f-82c5-b77fe4ce7595/dark_souls_wiki_crystal_weapon.pdfIn PDF document text
    • http://tapepoxawire.epizy.com/history_of_the_world_part_1_trailer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35c9b51b-bd3e-4ab6-8e8e-b36bf0fd14b6/sustainable_development_goals_2015.pdfIn PDF document text
    • http://lizuruvabeg.epizy.com/que_significa_ser_lider_de_un_equipo.pdfIn PDF document text
    • http://baxolorojujore.rf.gd/nimevoduvozawilawa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2edadf2c-6764-48fd-bed6-9316ea232678/sherlock_holmes_movie_download_in_hindi_480p_bolly4u.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42773582-2527-40df-bcd8-adf089b83d7f/chick_fil_a_medium_mac_and_cheese_carbs.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_off0000f670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF670 4932 bytes
SHA-256: e1b4f8aa9ac7f88c88b1d67e5fec37ba89999fe0e6396d1d04a02cff642b9447
font_01_sfnt_off0001075d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1075D 10660 bytes
SHA-256: 98b75bc3fd29b5663e522dbdf1dd955e0713cf61c6c50682a1a74d7ae77911a3

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