Malicious PDF — malware analysis report

Static analysis result for SHA-256 b971ffa1ae0225af…

MALICIOUS

PDF

77.9 KB Created: 2021-03-19 19:55:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5626f1c6ae536fbe63c7fafe724834df SHA-1: d8e41258d55c016ffac7da2a7aa96999dd89e1d6 SHA-256: b971ffa1ae0225af08cd90315af88214b88639c5d58e8da4f4a37a00069fa99f
164 Risk Score

Malware Insights

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

The PDF contains a lure related to 'mobile legends item guide app' and embeds numerous external links, including one to 'bologen.ru'. Heuristics indicate a link farm and a ML classifier flagged the PDF as malicious, consistent with phishing or malware distribution. ClamAV also detected it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://bologen.ru/wix?keyword=mobile+legends+item+guide+app
    • https://lotunesu.weebly.com/uploads/1/3/0/9/130969364/wozuluj-ziwub-loxedefesigun.pdf
    • https://vobikonim.weebly.com/uploads/1/3/5/3/135390296/5556626.pdf
    • https://luxoxika.weebly.com/uploads/1/3/4/8/134899107/9576952.pdf
    • https://suguturame.weebly.com/uploads/1/3/1/4/131438741/gixulepobuxoduv_bogadipizolom_warukufono.pdf
    • https://pikitepilizoj.weebly.com/uploads/1/3/5/3/135332880/9b6790e.pdf
    • https://lobovalosidim.weebly.com/uploads/1/3/1/4/131437181/1681793.pdf
    • https://popepinasi.weebly.com/uploads/1/3/4/8/134892117/gitepibagebi-sakiwizoji-bemade-menega.pdf
    • https://suzazega.weebly.com/uploads/1/3/4/4/134476369/xedovab.pdf
    • https://jafuxanabowam.weebly.com/uploads/1/3/5/3/135383447/5571383.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tawaxinazaka.rf.gd/mosotodomitufu.pdf
    • https://uploads.strikinglycdn.com/files/636ea2a4-d2d0-4776-be77-435b24606310/zupaxuwegerepufe.pdf
    • https://104e0e48-a4c2-4a03-8647-06ef64d4e6ac.filesusr.com/ugd/e2c6c1_94c8d59e99b0469cb15eed94b1a61193.pdf?index=true
    • https://62dace35-232c-43a2-b3e8-6cf19ad57148.filesusr.com/ugd/42ae31_ffb0a3b0233a48849648dfd248365e6c.pdf?index=true
    • http://fojisar.rf.gd/cheaper_by_the_dozen_2003.pdf
    • https://29ca30ec-7ad4-487f-8637-d2d67f3a323c.filesusr.com/ugd/10b11f_5ed3f7183d5a4e548283d6d48a8126c9.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4684e9b5-5426-4298-8e5a-ec4c07f2c58a/cask_of_amontillado_summary_story.pdf
    • https://uploads.strikinglycdn.com/files/2cb1e534-2f93-46e2-acdb-d2ea4bf4e814/e3_error_on_walgreens_blood_pressure_machine.pdf
    • http://kimogule.epizy.com/pomilaluxotikesumurob.pdf
    • https://0298dc5a-7924-4276-8279-06452a5288da.filesusr.com/ugd/b30cf0_c0fa2da284c1430d8baa2fb4160ddf74.pdf?index=true
    • https://s3.amazonaws.com/kudowo/miya_bhai_song_lyrics_free.pdf
    • https://s3.amazonaws.com/sabegokek/nc_secretary_of_state_annual_report.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_off0000f27a.bin
d38c3bce78d15676704341d5be3b9f6f7784bafaae14fa43d780a93f224e6983		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF27A 5328 bytes
font_01_sfnt_off0001048e.bin
5838678a6e0a370f4c9059754ae0806aad2484c91a0c9def39a6f81ef8123071		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1048E 11080 bytes

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