Malicious PDF — malware analysis report

Static analysis result for SHA-256 33b6df6da286f10e…

MALICIOUS

PDF

78.5 KB Created: 2021-02-23 22:37:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: c9fe8d6f92c5a4100b1c45517cc18e5f SHA-1: ac53493e7d16f20f1fc812bf05c24afdb81cf539 SHA-256: 33b6df6da286f10e9e30e2cb2570068d8dd81db8dcdb6ec897408453d0819c9a
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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://crophysi.ru/wix?keyword=ffxiv+dragoon+rotation+stormblood In PDF document text
    • http://tamakar.tech/weight_gaining_diet_planmo9ud.pdfIn PDF document text
    • https://kazigujexumakul.weebly.com/uploads/1/3/4/3/134320364/4aaf1276c.pdfIn PDF document text
    • http://pokemonrivals.online/89090645532xv45n.pdfIn PDF document text
    • https://guretaximijogu.weebly.com/uploads/1/3/0/7/130739376/zigedawewudow.pdfIn PDF document text
    • https://jadufebifov.weebly.com/uploads/1/3/4/6/134627690/43a526624b2658.pdfIn PDF document text
    • https://cdn.sqhk.co/lanasido/4uhbtnx/7613932566.pdfIn PDF document text
    • http://genoray.pro/cinema_hd_v2_apk_for_iphonedbsz2.pdfIn PDF document text
    • https://cdn.sqhk.co/vemikozoj/gi6jfUV/weather_nyc_today_10_day.pdfIn PDF document text
    • http://chategratis.online/long_lake_chippewa_county_fishing_report5f6xw.pdfIn PDF document text
    • https://cdn.sqhk.co/gupimupiset/hjgiQuu/bomb_manual_version_1_ita.pdfIn PDF document text
    • http://mscredit.info/posaletanlyqzn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409258/normal_60011d22a1a1b.pdfIn PDF document text
    • https://cdn.sqhk.co/vumojakizaw/uOCiiib/samsung_security_policy_app.pdfIn PDF document text
    • https://rozozejowetape.weebly.com/uploads/1/3/4/5/134510424/4170370.pdfIn PDF document text
    • https://cdn.sqhk.co/toromerepowa/LiiWhiB/mukowebamuzopepow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FD 5448 bytes
SHA-256: 491eee0429d7dd28aeff61f810296fc6f80263f3b11202a7aad3543680c06c9f
font_01_sfnt_off0001097f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1097F 10472 bytes
SHA-256: 49c019f5b868c1da702954582de746144916e8f9ee420c0013cdf809199e4d71

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