Malicious PDF — malware analysis report

Static analysis result for SHA-256 c196d35f519cb5f1…

MALICIOUS

PDF

80.6 KB Created: 2021-03-26 09:25:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: ece4b7b90dc4c380492465336bacdd07 SHA-1: bea969b714602cfbe6ad572197c50ecebabb8e0b SHA-256: c196d35f519cb5f181cbb535f5199738391ae6600d4c83cad7f30146900552ce
136 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document body and heuristics suggest a lure related to 'Android studio ndk path linux' to entice users. The presence of external URLs, particularly those leading to other PDF files, indicates a likely multi-stage attack where this PDF serves as an initial dropper or redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://xajibur.ru/123?utm_term=android+studio+ndk+path+linux PDF link annotation
    • http://pasadurasasagi.medianewsonline.com/29036867317.pdfIn PDF document text
    • http://salonlabs.xyz/313664116844jzsw.pdfIn PDF document text
    • http://all-casino.xyz/lego_advent_calendar_instructions_41353itw16.pdfIn PDF document text
    • http://saniwofixapu.mygamesonline.org/momesodapukumev.pdfIn PDF document text
    • https://cdn.sqhk.co/pazakazagoz/icBgegf/80937956661.pdfIn PDF document text
    • http://xalenupom.getenjoyment.net/mcq_on_periodic_table.pdfIn PDF document text
    • http://tixshopclub.fun/tozijofiosa5m.pdfIn PDF document text
    • http://pewekelexu.mygamesonline.org/are_mattresses_for_pack_n_plays_safe.pdfIn PDF document text
    • http://idealica-italiaofficial.site/how_to_mix_baking_powder_and_flourn5w5r.pdfIn PDF document text
    • http://nulivanofika.mygamesonline.org/31760590265.pdfIn PDF document text
    • http://sumapewub.getenjoyment.net/98196689689.pdfIn PDF document text
    • https://cdn.sqhk.co/japokaxe/78Mhfja/city_jogger_stroller_gt.pdfIn PDF document text
    • https://cdn.sqhk.co/ranetixeba/YjhB1vN/4393941038.pdfIn PDF document text
    • https://cdn.sqhk.co/bapisolel/ajbidH3/5968866591.pdfIn PDF document text
    • http://domobifotuza.sportsontheweb.net/49482278083.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/sikuva/skeleton_3d_anatomy_apk_full_unlocked.pdfIn PDF document text
    • https://s3.amazonaws.com/vukujidor/2012_toyota_highlander_oil_reset.pdfIn PDF document text
    • https://s3.amazonaws.com/zubata/vipubezumajavirigiri.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/command_and_conquer_computer_game.pdfIn PDF document text
    • http://susabumo.atwebpages.com/klaviernoten_barfu_am_klavier_kostenlos.pdfIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/cambridge_checkpoint_science_workbook_3_answers.pdfIn PDF document text
    • https://developer.android.com/ndk/downloads/index.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

Related samples 8

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_off0000ec93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC93 4932 bytes
SHA-256: 783d3feb146c28251b3407cc2a497c3f562668b462328c11d24d51c95dfda2b8
font_01_sfnt_off0000fd42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD42 12184 bytes
SHA-256: c80dad6079e38ee4920e7e73a2c1df2b3c7592cff8b50cc6d6e59f00454c12a8
font_02_sfnt_off000126eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126EB 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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