Malicious PDF — malware analysis report

Static analysis result for SHA-256 534705574234039c…

MALICIOUS

PDF

72.1 KB Created: 2021-02-24 01:32:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b5d6d14062da25ad427c245bc6c51894 SHA-1: 4c7ecaadff176973eba1171102d79a50073d6599 SHA-256: 534705574234039c5f3feb5e4121f017a75d832492ba4e24b6ac26f5f5a17503
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, many of which point to disposable domains and are flagged as malicious redirectors. The document body, though heavily obfuscated, appears to be a lure related to calibration instructions, likely intended to trick users into clicking malicious links. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://yafferge.ru/strik?utm_term=how+to+calibrate+omron+blood+pressure+monitor+bp786n In PDF document text
    • https://cdn-cms.f-static.net/uploads/4421039/normal_5fd7c628919b8.pdfIn PDF document text
    • http://blu-ital.space/vebevitagdj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491168/normal_600b073275226.pdfIn PDF document text
    • http://prodit.space/xepodaribivikipepofonabkalap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490251/normal_60292005c4380.pdfIn PDF document text
    • http://vanlit.ru/87854174526clecj.pdfIn PDF document text
    • https://cdn.sqhk.co/wadupaxi/eoGq5ih/auto_photo_background_change_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4528260/normal_5fe86099aa5a0.pdfIn PDF document text
    • https://cdn.sqhk.co/mexovaru/jghf5hj/vugukudupufuzurefovoso.pdfIn PDF document text
    • https://cdn.sqhk.co/xesozugis/gAHX6ia/57657387009.pdfIn PDF document text
    • http://espaceabone.com/923294873392s1el.pdfIn PDF document text
    • http://presentinsta.site/12338056096fth57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487658/normal_6010a8421e8c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381287/normal_5fdacb4ad255b.pdfIn PDF document text
    • https://cdn.sqhk.co/judixixelof/jjohvig/cricket_rules_bowling_action.pdfIn PDF document text
    • http://3bki.ru/beautiful_song_audio_by_bukunmi_oluwashinalxe5d.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
    • https://s3.amazonaws.com/novifamigot/baby_george_rotisserie_manual.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

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE64 5724 bytes
SHA-256: e272569fbdbac9e97792a758a5632efa6c02815d4285ed2443f8cc4740a7977c
font_01_sfnt_off0000e1c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C8 10316 bytes
SHA-256: f13aae8e4234e4cbd98d89ef53e528508e6ec06f22cf37d54817d6b3bfc1324c
font_02_sfnt_off0001051d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1051D 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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