Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc1dd38b67fb0d4c…

MALICIOUS

PDF

88.1 KB Created: 2021-04-04 02:13:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 29c5cfd525b2eaaebe7e7e85dcf91431 SHA-1: d66fdaa448fe8a3168ccda6f2b111f71d498e3ea SHA-256: cc1dd38b67fb0d4cf4243b457698204f2df1124f7f182558e84628312ed8d6ac
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains keywords related to guitar chords, likely serving as a lure to disguise the malicious nature of the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://resalured.ru/strik?utm_term=guitar+hindi+songs+chords+pdf PDF link annotation
    • http://gadadanufadapeb.iblogger.org/axial_yeti_body_and_cage.pdfIn PDF document text
    • http://meribikuje.22web.org/filulijakulawame.pdfIn PDF document text
    • https://cdn.sqhk.co/xivovido/hZbyQbZ/surah_shams_english_translation.pdfIn PDF document text
    • https://cdn.sqhk.co/dusaradezat/hfh4gdv/5708846850.pdfIn PDF document text
    • https://cdn.sqhk.co/wixadigizal/RFjuyk9/35395538254.pdfIn PDF document text
    • http://difajizozefu.22web.org/sweetbitter_stephanie_danler_espaol.pdfIn PDF document text
    • https://toruganaduloxo.weebly.com/uploads/1/3/5/3/135347606/8c8e61de8.pdfIn PDF document text
    • https://livakazogoje.weebly.com/uploads/1/3/4/6/134622539/wujafamej.pdfIn PDF document text
    • https://cdn.sqhk.co/dolitife/jgdRhjp/first_strike_ration_case_for_sale.pdfIn PDF document text
    • https://jeboxalu.weebly.com/uploads/1/3/0/9/130969965/garexusatevigu_zevaser_ximokutilazoxom.pdfIn PDF document text
    • https://moxalabukeziro.weebly.com/uploads/1/3/4/7/134772199/ba8b140.pdfIn PDF document text
    • https://xajerunufunofe.weebly.com/uploads/1/3/1/3/131378991/fa3eb9e93d.pdfIn PDF document text
    • https://cdn.sqhk.co/vimexuda/zrgdjlZ/wallpaper_hd_free_fire_video.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/f8734078-a06a-4a5e-9c28-112360a4ca9e/how_to_reset_zap_remote.pdfIn PDF document text
    • https://c4e42e93-254c-4ba8-b495-737f84002742.filesusr.com/ugd/ddb60a_98bb8dcfc73b4f318cc2477e265449a3.pdf?index=trueIn PDF document text
    • https://6a9ecc2b-05c3-4056-8705-773ae6be8cdd.filesusr.com/ugd/7a359d_29896c2495e448a3995d0d8514ae4a05.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb4268a9-ca60-419f-950a-a1accb6d70eb/kovefoturukikede.pdfIn PDF document text
    • https://70010cfe-69b1-4fe9-a336-bdfe2418dc1e.filesusr.com/ugd/f1d680_cd558b4c79254edd83b3d190094f1455.pdf?index=trueIn PDF document text
    • https://e791dc30-71fd-4519-a75e-453748eb9c32.filesusr.com/ugd/8a5fcf_a98903d5533243099c1f69997fbc6da4.pdf?index=trueIn PDF document text
    • https://203e60c5-e32a-4587-ab6d-31d66de6d5b9.filesusr.com/ugd/014c36_38fe1ab4c0f64793ab6e0cea711237c3.pdf?index=trueIn PDF document text
    • https://ee6bc897-aa08-459d-b6e6-b1b1d69fcba1.filesusr.com/ugd/7ba596_54380c12d86942f3ba2491d4d16cec65.pdf?index=trueIn PDF document text
    • https://e9b66cc5-9289-431c-8f17-6739e1cd2d88.filesusr.com/ugd/c8f33b_71fdde3b24844bf5a9fbac2a900d66be.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1a12eaa-75cf-4d7b-a221-a3bd7f13d2d3/ag_16_fundamental_truths.pdfIn PDF document text
    • http://rokivurudaga.epizy.com/6194194442.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5623797-7a50-482b-aa37-6fcbd8aace6b/what_are_some_critical_thinking_questions.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_off00010cb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB7 5180 bytes
SHA-256: 52eaacaeea84cc42721232681b2bed4da65f9facc644f1a3c443753da545cec6
font_01_sfnt_off00011e4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E4E 11280 bytes
SHA-256: bb1917bae2cae629f0dc739f1c4889cf3c5a79b1cf72b5557d78418de3736ae1
font_02_sfnt_off00014499.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14499 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e