Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b326895b614d1b1…

MALICIOUS

PDF

76.4 KB Created: 2021-04-03 13:58:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 23ade60ebb7400268ba6c91992a0e8bc SHA-1: e5b0e1e3ce875a466dd39244b74f65eef0f820a6 SHA-256: 5b326895b614d1b16cebea93d5410a76829cfd5b598d4fc1fb412b4681ac973d
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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://gimoguvi.ru/award?keyword=husqvarna+automower+315x+bedienungsanleitung+pdf PDF link annotation
    • https://cdn.sqhk.co/tuwagezo/jduBKhd/towovejemiwemubufamonoza.pdfIn PDF document text
    • http://rakadan.sportsontheweb.net/kant_aufklrung.pdfIn PDF document text
    • https://cdn.sqhk.co/kekotenonaxu/aaRLuii/flick_basketball_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/moxawitab/pgdfhic/dj_music_player_free_download_for_windows_7.pdfIn PDF document text
    • https://cdn.sqhk.co/wugunifikezu/oijHghr/kufusaxojaga.pdfIn PDF document text
    • https://cdn.sqhk.co/novitovikor/hfjcthg/barobevesejageda.pdfIn PDF document text
    • http://trysoda.pro/weber_genesis_silver_b_conversion_to_natural_gas7k460.pdfIn PDF document text
    • http://gradstroy.su/how_to_change_oil_in_2010_priusfx9f2.pdfIn PDF document text
    • http://digtalcaliper09.xyz/13810778537idbtl.pdfIn PDF document text
    • http://cashfree.store/how_to_clean_navien_tankless_water_heaterrz3xa.pdfIn PDF document text
    • http://opt15.ru/dark_souls_2_dlc_boss_guidepz9mc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kadekosaraf.epizy.com/pufemegeloziku.pdfIn PDF document text
    • http://vipezexazagi.epizy.com/nomevalawokoremolawa.pdfIn PDF document text
    • http://rolozaj.epizy.com/momezo.pdfIn PDF document text
    • https://50037ee0-0691-4a53-bdc2-b2f8f795cfa6.filesusr.com/ugd/b41a9a_4336abc624c2430c8f1090e1d447af55.pdf?index=trueIn PDF document text
    • http://laxuzoto.onlinewebshop.net/bamobimil.pdfIn PDF document text
    • https://6c473ef0-402e-45f0-9f95-6bc7e89a6a1a.filesusr.com/ugd/5518c3_3be6189750ca4df0a27dfbcc36e48d14.pdf?index=trueIn PDF document text
    • https://27420876-d215-4860-9a72-f48db0d0c320.filesusr.com/ugd/4062c2_9bf8858a2c6f4fcd8cf9c0e3dc0746c3.pdf?index=trueIn PDF document text
    • http://gizogorofu.onlinewebshop.net/32085091276.pdfIn PDF document text
    • https://70a023e4-b173-4b34-8ac5-854d526a16b0.filesusr.com/ugd/5aec30_eaf24e955e8147f3a84d0535182606bd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/voxaxuxegujedelidazezig.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/45277826427.pdfIn PDF document text
    • http://nilikejavovop.rf.gd/86162004443.pdfIn PDF document text
    • http://wazozugafen.epizy.com/joe_s_barber_shop_game_free.pdfIn PDF document text
    • https://b70645e9-42d7-44c6-80f2-f165c8819e8d.filesusr.com/ugd/3f1130_aed4864057ab45a3bf81a964d1b1aaca.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE570 6148 bytes
SHA-256: 21be9e565b14e0b30a0822f4cb54ff5dd2db23aa3918aa7c890faea7d80001be
font_01_sfnt_off0000fa59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA59 12004 bytes
SHA-256: 1035830787793e2b2d535b39ddf781aa2096a46590b608ca4b62af397b5c8c6a

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