Malicious PDF — malware analysis report

Static analysis result for SHA-256 e54aef16598279d6…

MALICIOUS

PDF

86.9 KB Created: 2021-02-27 14:47:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 175cb43ba5db20538e306da6aad5b95b SHA-1: 45f922af23ba6760803b28d8a06818c4b0e1522e SHA-256: e54aef16598279d626e0b19421e5b872361350f5e9e5d22d96184a984c5cf437
184 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical alert for linking to known malicious redirector infrastructure. The embedded links point to disposable hosting and are likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the nature of the links suggests an intent to redirect the user to a malicious second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dafemum.ru/123?utm_term=lord+of+chaos+movie+review In PDF document text
    • https://pobanuti.weebly.com/uploads/1/3/1/4/131437932/7a7930.pdfIn PDF document text
    • https://xedagiwaki.weebly.com/uploads/1/3/1/8/131856626/zesajopozutiwitoti.pdfIn PDF document text
    • http://gajaxujifusokul.mygamesonline.org/85916532074.pdfIn PDF document text
    • https://mujurusema.weebly.com/uploads/1/3/4/8/134846640/522350ef7579af1.pdfIn PDF document text
    • https://moluzepin.weebly.com/uploads/1/3/1/8/131856103/1b4be3df828df18.pdfIn PDF document text
    • http://rabiveronoxo.22web.org/is_jump_rope_cardio_or_strength.pdfIn PDF document text
    • http://xiwefugu.iblogger.org/chapter_8_9_10_accounting_test.pdfIn PDF document text
    • https://rusipamisu.weebly.com/uploads/1/3/4/0/134017355/gagusujol.pdfIn PDF document text
    • https://kawuzuke.weebly.com/uploads/1/3/1/6/131606938/13441edbd6.pdfIn PDF document text
    • http://pewadulojuba.mypressonline.com/16861342083.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457572/normal_60100420e0006.pdfIn PDF document text
    • https://xedagiwaki.weebly.com/uploads/1/3/1/8/131856626/65254a3c.pdfIn PDF document text
    • http://fakixigulidol.mywebcommunity.org/how_to_grow_butterhead_lettuce_from_seeds.pdfIn PDF document text
    • https://binufigelivu.weebly.com/uploads/1/3/4/7/134775083/464914.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fiforeru.atwebpages.com/91434393805.pdfIn PDF document text
    • http://xirubutoluj.rf.gd/figures_of_speech_quiz_with_answers_ppt.pdfIn PDF document text
    • http://jawuguv.epizy.com/46540234907.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010751.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10751 4924 bytes
SHA-256: 4ea6eba86b80e40667b9443f7b71509bab462c82ca44d91863c0c4d70eec6bc5
font_01_sfnt_off00011820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11820 12380 bytes
SHA-256: cc39d3c2c1214d82c80be2978aa5449eff0b6ed1a7252b960fd40aa87862b734
font_02_sfnt_off00013ff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FF3 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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