Malicious PDF — malware analysis report

Static analysis result for SHA-256 e362ab242eeaf575…

MALICIOUS

PDF

82.8 KB Created: 2021-03-18 12:16:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70543987e7da0a8ab510c3238c25be6c SHA-1: 5fb2e243720463f7dd47e96fb5f5d548ac4ba91b SHA-256: e362ab242eeaf575243429e65656267f4df0d62e43fe79f821e84572dc596a57
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to other PDFs, suggesting a link farm or SEO poisoning tactic. One prominent URL, 'https://botokaw.ru/wix?keyword=crossfire+apk+mod+offline', indicates a lure to download potentially malicious software. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/wix?keyword=crossfire+apk+mod+offline
    • https://static.s123-cdn-static.com/uploads/4499021/normal_5ff40b8aa20e5.pdf
    • https://static.s123-cdn-static.com/uploads/4418746/normal_6000c4f5cf9d5.pdf
    • https://static.s123-cdn-static.com/uploads/4393190/normal_5fe12a4dd8ab0.pdf
    • https://cdn-cms.f-static.net/uploads/4451736/normal_601d6b295906c.pdf
    • https://static.s123-cdn-static.com/uploads/4496816/normal_5fef4d5715b8b.pdf
    • http://seluluxafej.22web.org/xoxukupebidum.pdf
    • https://static.s123-cdn-static.com/uploads/4411229/normal_5fed0f900d260.pdf
    • https://cdn-cms.f-static.net/uploads/4392867/normal_6014ed7bd8d35.pdf
    • https://static.s123-cdn-static.com/uploads/4446645/normal_5fd07c1a73527.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rekorewexidiwo/badekax.pdf
    • https://3e1d1bad-f645-4ebd-ac75-469e7ff7c972.filesusr.com/ugd/e745be_372a6311cfa84986a43867f6962b74a1.pdf?index=true
    • https://uploads.strikinglycdn.com/files/e3d476d6-2172-4a8e-a368-32051dd0dc02/how_much_does_kitchenaid_glass_bowl_weigh.pdf
    • https://s3.amazonaws.com/fadadedezeker/atualizao_android_j7.pdf
    • https://s3.amazonaws.com/viregujipowuru/91893315451.pdf
    • http://tufukupetateto.epizy.com/cat_exam_full_form.pdf
    • https://s3.amazonaws.com/zinudipir/3323806680.pdf
    • https://uploads.strikinglycdn.com/files/0fbd2680-230a-4497-a5de-147f94b9f936/what_is_the_best_vibration_exercise_machine_to_buy.pdf
    • https://dc58184e-bbba-402a-8e08-a55d552c8f3f.filesusr.com/ugd/0ebc1f_dc47823a242e46dc9b9eaa285cb88950.pdf?index=true
    • https://uploads.strikinglycdn.com/files/da24037c-bd6c-4cf5-aba0-8125ab8e5933/what_do_you_mean_by_plant_physiology.pdf
    • https://45dcde1a-aed5-4138-b95e-a0f768a283bf.filesusr.com/ugd/89441e_4f453b74723d49f7b9ff7cf10b915dab.pdf?index=true
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f03f.bin
f30ef08cce5c75a557e96d1c14e095af75a50247f20656b007e22d8bd681cd68
pdf-font-stream PDF embedded font (sfnt) at offset 0xF03F 5156 bytes
font_01_sfnt_off000101b5.bin
97cbebdff1afa0cdf0f06588bdb2d271d479f2e9185f00fd01085cfb04bbb895
pdf-font-stream PDF embedded font (sfnt) at offset 0x101B5 11684 bytes
font_02_sfnt_off0001291c.bin
e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848
pdf-font-stream PDF embedded font (sfnt) at offset 0x1291C 16092 bytes