Malicious PDF — malware analysis report

Static analysis result for SHA-256 32778aa01f71fe77…

MALICIOUS

PDF

113.9 KB Created: 2021-03-24 01:05:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f5e8fcbecb5aad0f085a42f6f9a9658 SHA-1: ed44677593ae332af051a2887f6f554ccd0bcd4d SHA-256: 32778aa01f71fe77e32f9e2d514a0318013d8a52cd27bdd5a33dd56793a558b5
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which are part of a link farm designed to appear as legitimate content. The primary URL, 'https://lozipotod.ru/wix?keyword=clicker+remote+keypad+manual', suggests a lure for users seeking a manual, likely leading to a phishing or malware download site. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan.

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-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://lozipotod.ru/wix?keyword=clicker+remote+keypad+manual
    • https://cdn.sqhk.co/jupumezu/jigkigY/fall_out_boy_immortals_piano_sheet_music.pdf
    • https://cdn-cms.f-static.net/uploads/4470692/normal_5fe9304c1012e.pdf
    • https://cdn.sqhk.co/kuwusemob/CtgeAkE/xujugu.pdf
    • http://steh-sistem.ru/30332149484uiq8p.pdf
    • https://cdn.sqhk.co/xedufoga/djcg9Pu/mimawujifupivunikujaxiwal.pdf
    • http://prizinsta365.website/89089330578gyu4i.pdf
    • https://duluvozega.weebly.com/uploads/1/3/5/3/135327827/nureketelugezifap.pdf
    • https://static.s123-cdn-static.com/uploads/4481675/normal_5fedd48ac1e77.pdf
    • https://xizirujikalowev.weebly.com/uploads/1/3/1/4/131454807/9ecb357011c194.pdf
    • https://cdn-cms.f-static.net/uploads/4416659/normal_603127804bdd4.pdf
    • https://cdn-cms.f-static.net/uploads/4427498/normal_5fd7eef9100a9.pdf
    • http://moresukko.ru/oscar_wao_literary_analysisgzn9y.pdf
    • https://cdn.sqhk.co/tamaladafa/cjjBxj8/mercado_pago_argentina_mi_cuenta.pdf
    • https://cdn-cms.f-static.net/uploads/4473651/normal_601924f179fec.pdf
    • https://cdn.sqhk.co/betewulo/didijhh/crime_scene_investigation_definition_for_dummies.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://b81e1767-bb0d-4562-9f98-cfef66859bb1.filesusr.com/ugd/b48b60_d9eb99508cea46e0a5599454c2c069cb.pdf?index=true
    • https://307a23dc-bb60-4906-9a68-69e45957aa19.filesusr.com/ugd/d2057d_9464fe6a583f40cb830d6672f6b34972.pdf?index=true
    • https://b304dada-1952-41b2-af44-d16a3232bb3f.filesusr.com/ugd/c19c34_a8dd26d067d54a5d949c4f559757d023.pdf?index=true
    • https://50aad03f-9d2a-47e6-be13-abd12f321b17.filesusr.com/ugd/3fd638_a97f5887e49c469a8f94b052278a9136.pdf?index=true
    • https://75edee45-cd08-43cb-a752-0c33e5c2343f.filesusr.com/ugd/a7c173_cdf318757f5b4a82911dfd7aa6cdf220.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e98a.bin
153ccfca0a97e049262de8792abf12c7b27b460b6a9d9378b9adcbcd07d7bd70		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE98A 42584 bytes
font_01_sfnt_off00016b7b.bin
eeda6d88c5421d4287ccd54c4065588871780eb1324f11e5dbaeef9c864ac450		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16B7B 5112 bytes
font_02_sfnt_off00017cd3.bin
02cd8035642d70e96fc0d4b0f9b85da4720f8440b0eb63aa7a4b5092477dd40e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17CD3 10672 bytes
font_03_sfnt_off0001a1c2.bin
8de032c1c7dfc294918e634d9981f82750b3983f358c128238335e76cdbfc7ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A1C2 16892 bytes

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