Malicious PDF — malware analysis report

Static analysis result for SHA-256 de1bc62e2a186ae0…

MALICIOUS

PDF

80.9 KB Created: 2021-02-25 02:01:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 82584799d41c4f21c1e1fdd56f37951a SHA-1: 9fb811b9bf04ed19a6b0016caaac7ffdbdd6eb0a SHA-256: de1bc62e2a186ae05164a4fc790212cfc6ab493fee96e18530ecff55a6c6d183
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable hosting and redirector infrastructure, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are indicative of techniques used to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

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/award?keyword=iksar+hide+mask+eq In PDF document text
    • https://pipedexow.weebly.com/uploads/1/3/4/8/134852679/lowufubisove-giros.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490364/normal_5ffcfe1692fa3.pdfIn PDF document text
    • http://parkingtest.xyz/tipijomisizot8bk1z.pdfIn PDF document text
    • https://cdn.sqhk.co/gudijupimeb/wgdgeT5/79852549993.pdfIn PDF document text
    • https://pamuguvijokogag.weebly.com/uploads/1/3/4/8/134883264/rozudamib.pdfIn PDF document text
    • http://fitdieta.com/jegafewobiporawapwqxsj.pdfIn PDF document text
    • https://cdn.sqhk.co/moxoxitij/haFghia/jccsmart_login_road_tax.pdfIn PDF document text
    • http://whysmall.space/jerajukeragujuwonujur29d.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirurafixi/VWVji4C/hood_captions_for_instagram_pictures_for_guys.pdfIn PDF document text
    • http://odemebayisitrafik.com/anatomie_de_l_oreille_externeyc23j.pdfIn PDF document text
    • https://gipazekafasulal.weebly.com/uploads/1/3/4/6/134600210/14a2145ef7c5f3.pdfIn PDF document text
    • http://precabinets.xyz/editing_marks_guides60x3.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/rojalexipokadaz/what_does_8_channel_cctv_mean.pdfIn PDF document text
    • https://s3.amazonaws.com/jaloto/ijazat_song_ming._se.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/months_of_the_year_in_french_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/wiwopoxomurosiremi.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_off0000ecc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC9 4652 bytes
SHA-256: 32ec63ec4606ff08531343a91bee544063ee8f3a86436649c3d2dbf320dc898e
font_01_sfnt_off0000fc74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC74 14020 bytes
SHA-256: a8efeae99085a32ba681037a674c10393cf3094d79fd64ba49533eb9e4e5bf39
font_02_sfnt_off00012893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12893 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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