Malicious PDF — malware analysis report

Static analysis result for SHA-256 9699477889a7b960…

MALICIOUS

PDF

90.7 KB Created: 2021-03-18 21:50:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 6d9084998c6f300afd790314bf283ff7 SHA-1: 264048795dacb744737a56cab9b4f9a9a5821001 SHA-256: 9699477889a7b960975f4da50e0bcdcc5f241417a08009b3757ddf93762e0204
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to disposable hosting and are likely part of a link farm designed to manipulate search engine results. One critical heuristic indicates a direct link to known malicious redirector infrastructure. ClamAV also detected this file as Pdf.Phishing.Trojan, further supporting its malicious nature. The embedded URLs are the primary indicators of malicious activity, likely leading to phishing pages or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/award?keyword=machines+like+me+free+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4408709/normal_60281864b015b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410018/normal_603b23555b438.pdfIn PDF document text
    • http://songkfrk.site/maruxipetapuresak12dj.pdfIn PDF document text
    • https://cdn.sqhk.co/giripiponi/uxgcFD2/wolf_girl_and_black_prince_movie_soundtrack_list.pdfIn PDF document text
    • https://cdn.sqhk.co/fijajiles/cWxhhgi/virtual_girlfriend_simulator.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474978/normal_5ffd42723b6a8.pdfIn PDF document text
    • http://respect-ltd.su/audacity_for_pc_getintopc4oo90.pdfIn PDF document text
    • http://openlait.pro/6826907228369i7p.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374185/normal_5fc917d53449e.pdfIn PDF document text
    • https://cdn.sqhk.co/zarepowake/jiiJZRq/siren_head_horror_house_story_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459165/normal_5fdbb437dd60b.pdfIn PDF document text
    • https://dakogepakidi.weebly.com/uploads/1/3/5/3/135391125/1145940.pdfIn PDF document text
    • https://cdn.sqhk.co/goxobuve/iif3gc1/total_launcher_app_drawer.pdfIn PDF document text
    • https://dewixazupeteti.weebly.com/uploads/1/3/1/4/131455636/garigirab-fuzibi.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovebakeb/Rgi0hhD/daily_sale_discount_code.pdfIn PDF document text
    • https://cdn.sqhk.co/nakijalufiw/eidqgdz/grass_cutter_machine_for_sale_philippines.pdfIn PDF document text
    • https://nasijominazol.weebly.com/uploads/1/3/4/3/134366940/0543052b.pdfIn PDF document text
    • http://drilltech.info/batch_programming_for_loopy6b2x.pdfIn PDF document text
    • http://bcpzon4segurabetaviabcp.com/mumadigebebogemukimevyzral.pdfIn PDF document text
    • http://streichpack.online/xuzutewinofipegbh.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
    • 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_off0001144f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1144F 5060 bytes
SHA-256: 517f4e184fce5e3e5f5efc81a70bbb18da4e76ceae308ea055f014c71a326c55
font_01_sfnt_off00012544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12544 12692 bytes
SHA-256: cfdc87039d37c1ce53373d5c2f0bd94900f827e64254f977f000e13c8484ab2d
font_02_sfnt_off00014f69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F69 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333