Malicious PDF — malware analysis report

Static analysis result for SHA-256 952d8c0c0a638abb…

MALICIOUS

PDF

66.2 KB Created: 2021-02-24 01:08:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b411a8b7c8c40f2680881c0d263d6fe9 SHA-1: d4956cccdc757c6fd7421e27138a24cbe44eb901 SHA-256: 952d8c0c0a638abb7805450069511fe299c15d61072f6282acd14c5e641dbb3a
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 are disguised as search results for popular software like Minecraft. This indicates a link farm designed to trick users into downloading malicious files. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution.

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://seumenha.ru/wix?keyword=minecraft+apk+pe+apkpure
    • https://static.s123-cdn-static.com/uploads/4365541/normal_6007b829b0afd.pdf
    • https://static.s123-cdn-static.com/uploads/4490371/normal_5fec82583c544.pdf
    • https://zevuraze.weebly.com/uploads/1/3/4/4/134440796/216637.pdf
    • https://menesifewo.weebly.com/uploads/1/3/0/8/130814293/womuwojokometezexazu.pdf
    • https://zinuwikisabarek.weebly.com/uploads/1/3/4/6/134679236/melaxoxux.pdf
    • https://panidulupeju.weebly.com/uploads/1/3/0/9/130969186/xipelaxukoledobifis.pdf
    • https://jubibesu.weebly.com/uploads/1/3/1/3/131379113/4875655.pdf
    • https://fevuxutub.weebly.com/uploads/1/3/4/1/134131759/170a98d931491.pdf
    • https://luvatuxi.weebly.com/uploads/1/3/4/3/134321506/5d6cddbb65863bd.pdf
    • https://static.s123-cdn-static.com/uploads/4467287/normal_5fcf3d9044a3f.pdf
    • https://mogopefisumiba.weebly.com/uploads/1/3/5/2/135295831/babomugit-zujutafosizixuf.pdf
    • https:///www.minecraft.net/help
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tuzipani.rf.gd/virejilodowabozasifo.pdf
    • http://sakigekoxigukil.epizy.com/82377957898.pdf
    • http://lubesugoninop.epizy.com/5_dysfunctions_of_a_team_facilitator_guide.pdf
    • http://juwebud.epizy.com/wonem.pdf
    • http://bunokupisosep.epizy.com/paris_metro_map_2019.pdf
    • https://s3.amazonaws.com/wukevirenesu/adding_fractions_exercises_with_answers.pdf
    • https://s3.amazonaws.com/vofadoloves/free_sheet_music_ave_maria_piano_solo.pdf
    • https://s3.amazonaws.com/voxipanovigepiv/moviledizamugekugoliripi.pdf
    • https://s3.amazonaws.com/gazitif/denaketuwuvemunowowof.pdf
    • https://s3.amazonaws.com/garorowa/alien_vs_predator_extinction_ps2.pdf
    • https://s3.amazonaws.com/fejififimaketo/2020_census_format.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_off0000c805.bin
e90beefc830d7b9f1b6d7b7bad48bf3a09a243dd505b3a38f28789c319a27080		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC805 4868 bytes
font_01_sfnt_off0000d8ba.bin
ad6d6d569797ca286ed00aff161da57483b3d027587307116fbefd9ad4653c67		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BA 10244 bytes

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