Malicious PDF — malware analysis report

Static analysis result for SHA-256 9100b9c7a10365f8…

MALICIOUS

PDF

69.3 KB Created: 2021-03-16 03:06:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 705c07db4ffae6d19ee9fc0eccc42e16 SHA-1: 7f45a70fbe889b32e531c357b4324a363dd97d08 SHA-256: 9100b9c7a10365f812d8545a3b48b0e34b251f6ebcfa667d10262680a632ff2f
96 Risk Score

Malware Insights

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

The file is a PDF document detected as malicious by ML classifiers and ClamAV. It contains multiple embedded URLs, one of which is https://crophysi.ru/award?keyword=jurnal+keanekaragaman+bivalvia+pdf, suggesting a phishing or credential harvesting attempt. The document body is heavily obfuscated, but the presence of external URIs and the overall detection indicate a malicious intent to redirect the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://crophysi.ru/award?keyword=jurnal+keanekaragaman+bivalvia+pdf
    • http://torgservis-rus.ru/agartha_1_yoruba_movieafspo.pdf
    • http://adminhalil.com/how_do_you_reset_a_schlage_electronic_door_lockc9pys.pdf
    • http://wide-take.top/88638670112xwc3d.pdf
    • http://dmgameplan.com/wiwazsc4ad.pdf
    • http://medgaj.com/xuwugwmnjd.pdf
    • http://itslm.fun/vegadagetubefajaniluko4aaxr.pdf
    • http://zibikudupe.mywebcommunity.org/tajefonafegiwusaxajumu.pdf
    • http://katermore.ru/rigadogenixemerezexoxedmosmw.pdf
    • https://cdn-cms.f-static.net/uploads/4480732/normal_601387720a9c6.pdf
    • http://myfavoritesun.xyz/duvinizenizofomilonetirp7tzb.pdf
    • https://static.s123-cdn-static.com/uploads/4443598/normal_5ffc989a3bbd7.pdf
    • http://ch-bewertung-2888.xyz/39112846408zpio2.pdf
    • https://cdn-cms.f-static.net/uploads/4422377/normal_6048dad8c2186.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://9c43cb74-45e3-47de-9527-fda2e8336169.filesusr.com/ugd/af0aa9_0d7858a654ad4144b4ad85b4dbdad591.pdf?index=true
    • https://51fd5013-30c4-43d1-89ce-86564632a3b5.filesusr.com/ugd/9f06f8_a53f118af04c43b8a0e83fd5a5e75cf0.pdf?index=true
    • https://8d40832c-2e2b-4284-8151-bb35a16d80ac.filesusr.com/ugd/05d014_137ecfbbf8e247b6bfafd955957e8cc5.pdf?index=true
    • http://wonanikapudidak.atwebpages.com/what_makes_human_humans.pdf
    • https://b585a76b-fab5-4024-b0d2-f3ad95444197.filesusr.com/ugd/404203_d911756d5b294556b67b104a0efdf7f6.pdf?index=true
    • https://6cf80756-66c2-4d2e-b15d-ff1677cb7115.filesusr.com/ugd/2257e8_6485557ecede41bfb3cd20c5bc347bd1.pdf?index=true
    • https://doi.org/10.51742/ojsm.v2i1.107
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d21c.bin
1d93d701b5ddd08bcba7779a4115298279686f560ecb3813d9d64bd26f6fecc3
pdf-font-stream PDF embedded font (sfnt) at offset 0xD21C 5436 bytes
font_01_sfnt_off0000e491.bin
f267f8354713326b94f255a506189422ddc2f26c664c2db7c350a69a8576f31b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE491 10200 bytes