Malicious PDF — malware analysis report

Static analysis result for SHA-256 11c3d514094b30e7…

MALICIOUS

PDF

75.8 KB Created: 2021-01-31 01:28:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 360c59b23a64c76ccc0a420c594b4075 SHA-1: 03af080e55f3ed221aaeff1d8d7ff574058b18c7 SHA-256: 11c3d514094b30e73beb940c35919f8e1d3fe7b173f864e0752010e814ec5f3b
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of external links, indicating a potential link farm or SEO poisoning attempt. One of the primary URLs extracted is https://maypoin.ru/123?utm_term=mod+apk+f1+2016, which is likely part of the malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/123?utm_term=mod+apk+f1+2016
    • https://makifilibavik.weebly.com/uploads/1/3/5/3/135383918/def6f0de50a.pdf
    • https://gomimujexewawid.weebly.com/uploads/1/3/1/0/131070583/fizaserujenup.pdf
    • https://cdn-cms.f-static.net/uploads/4375352/normal_5fe82d8985457.pdf
    • https://static.s123-cdn-static.com/uploads/4479436/normal_5ff2591c7a734.pdf
    • https://static.s123-cdn-static.com/uploads/4458125/normal_5ffba1252a0df.pdf
    • https://vurabagugodemox.weebly.com/uploads/1/3/1/1/131164039/vosale.pdf
    • https://static.s123-cdn-static.com/uploads/4406820/normal_5ff28206cd99b.pdf
    • https://cdn-cms.f-static.net/uploads/4408981/normal_600a681621822.pdf
    • http://masito.space/cloud_9_smoke_shop_lincoln_nez3gqe.pdf
    • https://static.s123-cdn-static.com/uploads/4486346/normal_5fc582f92d876.pdf
    • https://pinozawekik.weebly.com/uploads/1/3/4/5/134589254/6617869.pdf
    • http://xepomujix.22web.org/cito_begrijpend_lezen_groep_7.pdf
    • https://cdn-cms.f-static.net/uploads/4386079/normal_600e331c12de7.pdf
    • https://static.s123-cdn-static.com/uploads/4381094/normal_600074530e409.pdf
    • https://static.s123-cdn-static.com/uploads/4402267/normal_5fecc31c4c18b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://falalovoxiwada.epizy.com/cyber_crime_ppt_for_students.pdf
    • http://lalatotusawedo.epizy.com/52591373861.pdf
    • http://zatajuvezutulo.rf.gd/arya_2_malayalam_movie_cinemavilla.pdf
    • http://jiguluvosasibun.epizy.com/26093610512.pdf
    • http://keguwaburafokul.epizy.com/morphology_of_flowering_plants_neet_notes.pdf
    • http://ropajevunowijit.epizy.com/sojajijepoxawusurezosopu.pdf
    • http://moganip.epizy.com/layers_of_the_atmosphere_answer_key.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_off0000eac7.bin
a55ef5ee6a2b32980af83e07c371f9c304d2cda6272464b6f56e648912831e08		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC7 5276 bytes
font_01_sfnt_off0000fceb.bin
6c414fba2a8af4a6468d4969c285f8d6e32e7466ece61e3f652d0aee0e82c8d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCEB 10952 bytes

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