Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0d1894aa1e50e97…

MALICIOUS

PDF

81.4 KB Created: 2021-03-25 04:30:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53e9938e0d56ad2e81f72b361e33257a SHA-1: 4b039579117aae622fa373f8fd0ac94a4f05a885 SHA-256: b0d1894aa1e50e970a8dd74e19d97b93bc1611a3074101bb365cd5f37c8639f6
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of external URIs. The document body, though heavily obfuscated, contains text related to 'Carnivores ice age hacked apk', suggesting a lure for downloading malicious content. The embedded URLs likely serve as download locations for second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/123?utm_term=carnivores+ice+age+hacked+apk
    • http://goodsun.fun/sa_ferrero_rocher71b76.pdf
    • https://sikiroradimer.weebly.com/uploads/1/3/4/6/134619363/4062883.pdf
    • https://cdn-cms.f-static.net/uploads/4414672/normal_602a830f6ec44.pdf
    • http://trysalon.xyz/63730514554gmuhv.pdf
    • http://togurebuk.66ghz.com/66289811440.pdf
    • https://zoxetojasag.weebly.com/uploads/1/3/1/4/131437223/7d7bb8e5.pdf
    • https://cdn-cms.f-static.net/uploads/4458833/normal_603f92d343450.pdf
    • http://istlan.space/1338621251018wkj.pdf
    • http://zuwaweno.iblogger.org/dunowuguto.pdf
    • https://cdn-cms.f-static.net/uploads/4401696/normal_60206301b206e.pdf
    • https://cdn-cms.f-static.net/uploads/4465125/normal_60494f239b624.pdf
    • https://cdn-cms.f-static.net/uploads/4413977/normal_603e95a17ce15.pdf
    • https://static.s123-cdn-static.com/uploads/4420025/normal_6001abfd12ca0.pdf
    • https://cdn-cms.f-static.net/uploads/4456389/normal_60330f879512f.pdf
    • https://xexigajusotojuz.weebly.com/uploads/1/3/1/6/131606060/pegodutelimuwuxideto.pdf
    • http://opt15.ru/vba_programming_language_tutorialpk4ey.pdf
    • https://nufawufaza.weebly.com/uploads/1/3/0/7/130740177/juvibemelosevov.pdf
    • https://static.s123-cdn-static.com/uploads/4417123/normal_5ffbd84b2209f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f7330172-68e5-4d01-8f7d-2a1450b5bba1/99138458629.pdf
    • http://naxezutozotos.rf.gd/vinowose.pdf
    • http://badokelo.rf.gd/zimaruvozemanugezigexu.pdf
    • https://uploads.strikinglycdn.com/files/e4d1277a-07f7-456d-b498-7ae4f3b428ce/95946632643.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f410.bin
75e948d45ab04c2753c0c51ab35f2e7ca794fcc9de5fb63214c5a2f2c22e330e
pdf-font-stream PDF embedded font (sfnt) at offset 0xF410 5332 bytes
font_01_sfnt_off0001062b.bin
62f106165a08c4e92a9b584c30e0b7ce7d82e0a56c410570dabb2b981cc483fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x1062B 16156 bytes