Malicious PDF — malware analysis report

Static analysis result for SHA-256 71e218ac72c3194d…

MALICIOUS

PDF

82.4 KB Created: 2021-03-24 21:31:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 746ebc6f096227d7550d922b02d2aa92 SHA-1: b3fbb50d17e3d0bf5528be2dd51f162918b10594 SHA-256: 71e218ac72c3194dbf007f53a1b9de171f75435785e7b50fc2fad7bcf553612d
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://baarspo.ru/123?utm_term=tera+yaar+badmash+song PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4427809/normal_60113bbfee569.pdfIn PDF document text
    • https://cdn.sqhk.co/fexejikexew/jhididK/warriors_orochi_4_gameplay_trailer.pdfIn PDF document text
    • http://idealica-italiaofficial.site/82269152028elnx1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475196/normal_604002945981e.pdfIn PDF document text
    • http://visionnew.xyz/givamarezilimuwipiltw89o.pdfIn PDF document text
    • https://cdn.sqhk.co/xakelafu/cxZhfja/you_are_precious_to_god_scripture.pdfIn PDF document text
    • https://cdn.sqhk.co/mekerijiwuv/jbouPT4/gravity_bong_topper.pdfIn PDF document text
    • https://cdn.sqhk.co/muvenetu/gigjeii/bike_race_game_download_apk4now.pdfIn PDF document text
    • https://cdn.sqhk.co/bupusudiva/grhao6p/road_trip_essentials_for_dogs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392195/normal_602790c698106.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373241/normal_6027cdfc7bd6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408718/normal_6022c56e60b43.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468571/normal_6003752de3daa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453105/normal_5fe5081b5fa84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482402/normal_6022830c01686.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379842/normal_5ff54e5d8fc11.pdfIn PDF document text
    • http://normal-id.com/74044567521g051w.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/d90da81c-4769-4f63-81df-74a84902a53b/35780831344.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f12ad2f-e765-4605-8e2d-27fab92bc306/does_comcast_offer_wireless_cable_boxes.pdfIn PDF document text
    • http://nivugugop.rf.gd/50445712973.pdfIn PDF document text
    • http://wunekoxewufomaf.epizy.com/guide_to_graduate_programs_in_clinical_psychology.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A4 5056 bytes
SHA-256: 28eb39bc6020bfa681e93a66644a495dffccac66ab7d48c62dda29f882f46dfa
font_01_sfnt_off000109a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A2 11084 bytes
SHA-256: dc5cb007a1674baccc39731175f9eb99ec8364421b8a6f43acf751950c469715
font_02_sfnt_off00012f5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F5E 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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