Malicious PDF — malware analysis report

Static analysis result for SHA-256 f94762e1a6f5e1ff…

MALICIOUS

PDF

78.1 KB Created: 2021-03-16 04:09:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea5f36889a61b481efe1cec84ff3d5a2 SHA-1: 9e357c91d38f6bb8f7c712460ff7dc6258732fb6 SHA-256: f94762e1a6f5e1ff5b7ce36148527420e41ca2a5e1505697f6271a3818707154
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it is designed to redirect users to external sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=aggiornamento+android+asus+me302kl
    • https://cdn.sqhk.co/zixemoliz/b4jh4I4/rogue_buddies_2_unblocked.pdf
    • https://static.s123-cdn-static.com/uploads/4369514/normal_5ff7e33d5cf23.pdf
    • https://cdn.sqhk.co/noxomosanena/ghtlehj/90529563173.pdf
    • https://cdn-cms.f-static.net/uploads/4385030/normal_601c5d923819f.pdf
    • https://cdn.sqhk.co/busibelifiv/ggqjdkY/the_archers_2_cheat_code.pdf
    • https://cdn.sqhk.co/rijujonakuje/RgfidSi/lalinonuvowukugad.pdf
    • https://cdn.sqhk.co/lezubenewago/iRrhfZK/war_background_music_ringtone_download_mp3.pdf
    • https://cdn.sqhk.co/xajevedu/ib2gdCP/88044563358.pdf
    • https://cdn.sqhk.co/lisesemafo/ljcjeyz/the_academy_the_first_riddle_walkthrough_chapter_2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/rogugagatuf/2703590995.pdf
    • https://s3.amazonaws.com/juzinaramip/motukunoje.pdf
    • https://c03439ef-6557-4199-865e-586791a52b6c.filesusr.com/ugd/6bb4a2_9119ff42aab24e2dbe0aaeda196bbe27.pdf?index=true
    • https://s3.amazonaws.com/zeworibuzoza/75283272433.pdf
    • https://s3.amazonaws.com/xelimewat/1979419939.pdf
    • https://s3.amazonaws.com/gedesisumi/adobe_premiere_elements_2019_link.pdf
    • https://4be8a7ba-6c9a-47a4-99fc-a5961b41a404.filesusr.com/ugd/132250_79f718e83ee646b584cb8eb6babd9e78.pdf?index=true
    • https://s3.amazonaws.com/buwosevax/kia_sorento_review_2018_carsguide.pdf
    • https://0d555108-1732-4721-8d72-76d747b2053a.filesusr.com/ugd/1b0481_b491f5e6419547f8b7ead1fe7850f05c.pdf?index=true
    • https://93dbb2ad-f1e8-4c6c-adfd-2ef134399473.filesusr.com/ugd/df4650_c94710f74e5145f0baceb53a9e201722.pdf?index=true
    • https://s3.amazonaws.com/kugelilizibuwum/formalist_criticism_sample_essay.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3df.bin
8a202b4b2f0321c688f08dfb45a0488c09aefbea17358d3d8e052dc910081b9f
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3DF 5520 bytes
font_01_sfnt_off0000f684.bin
a71fd64f8565cda4f4e56f635b435ab49e25adf2734ad4fb5250f0f621414d72
pdf-font-stream PDF embedded font (sfnt) at offset 0xF684 11720 bytes
font_02_sfnt_off00011cfc.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CFC 4324 bytes