Malicious PDF — malware analysis report

Static analysis result for SHA-256 34dbffbcec9dcb55…

MALICIOUS

PDF

94.3 KB Created: 2021-05-24 11:03:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 74a564e521efc01d198b4081d7861c37 SHA-1: 78c8f67c7de1c121ab5c0c15adb4bada85efd6d6 SHA-256: 34dbffbcec9dcb55d62a3dfc659b4da364f9fa2442d64177643fdd8b35ea1399
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many pointing to disposable hosting, indicating a link farm designed to attract traffic. One of the primary links includes a UTM term suggesting a lure related to 'real car parking mod apk ios'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware through the linked content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://jacksth.ru/strik?utm_term=real+car+parking+mod+apk+ios PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415080/normal_603e3d6514ec0.pdfIn PDF document text
    • https://tunugezujemis.weebly.com/uploads/1/3/4/3/134307821/1860075.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469638/normal_5fea2165b7c7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461751/normal_6044e1695ff22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499002/normal_5fd347f57c3cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392854/normal_5fdeb35ecdd7f.pdfIn PDF document text
    • https://xupodidif.weebly.com/uploads/1/3/0/7/130739682/0ba9c1.pdfIn PDF document text
    • https://pogiwubuwafax.weebly.com/uploads/1/3/0/7/130775808/1710740.pdfIn PDF document text
    • https://nolizusumebixaz.weebly.com/uploads/1/3/1/4/131438071/danesitekerab-kunepixi.pdfIn PDF document text
    • https://rinosebamajipem.weebly.com/uploads/1/3/4/6/134694393/a57e06520f.pdfIn PDF document text
    • https://zisetilu.weebly.com/uploads/1/3/1/3/131382786/6bbdadeddd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407087/normal_602411a824bb8.pdfIn PDF document text
    • https://sujepofuk.weebly.com/uploads/1/3/0/7/130775011/8592388.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420019/normal_602a275807ad7.pdfIn PDF document text
    • https://remofixar.weebly.com/uploads/1/3/0/7/130776049/tiponakipuvutekinivo.pdfIn PDF document text
    • https://rerofijujujedo.weebly.com/uploads/1/3/1/8/131872137/a681014c4b85.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://uploads.strikinglycdn.com/files/c4e5585d-e1c2-4307-b2ad-73d3ce9c02d3/taurus_pt111_g2_holster_bass_pro_shop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f285e4d-5b56-44e7-9375-aa586563aa44/30084047137.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a9af672-d920-4064-ae2b-2a2ef5e4563a/el_aleph_borges_wikipedia_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccd65dd0-e3b3-40e8-8603-e9192c21d10f/what_company_owns_epic_emr.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b178489-73d9-47f1-a048-89999122d093/ronco_showtime_rotisserie_5000_parts.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_off0001250f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1250F 5172 bytes
SHA-256: 308dc2b1bc843c89dadc1380c75234fdec6618afece04bc1dc3247c5c8a8c8b6
font_01_sfnt_off00013681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13681 11088 bytes
SHA-256: d0c826b7b28c440032a19907bff889f9944cceddaebf353eb6efe0fd2aeb16f4
font_02_sfnt_off00015c18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C18 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2