Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd1dd668f55baec3…

MALICIOUS

PDF

74.4 KB Created: 2021-03-04 06:44:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: b1d3ca870c4989264094d61174ee7afc SHA-1: c646280097810e8d49d5c0233c4edf87e24d858c SHA-256: bd1dd668f55baec3706641f057fd4637a6be0d1fe58bf3037c4a55b0ab423757
134 Risk Score

Malware Insights

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

The PDF was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of numerous external URIs, including a link farm hosted on disposable domains, suggests a phishing or malware distribution attempt. The heuristic 'SE_DOWNLOAD_BUTTON' further supports the lure-based attack pattern, aiming to trick users into clicking a malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://golowaki.ru/123?utm_term=full+quran+with+english+translation+audio+download PDF link annotation
    • https://cdn.sqhk.co/tedalome/ijiigjf/smart_balance_wheel_rohs_precio.pdfIn PDF document text
    • https://pufukowog.weebly.com/uploads/1/3/4/5/134583281/lejiwimez_xafizoxuvud_kodixip.pdfIn PDF document text
    • http://afterdealer.pro/play_flight_simulator_online_free_nowpe65.pdfIn PDF document text
    • https://cdn.sqhk.co/zigotimuti/FifhcZE/27664424255.pdfIn PDF document text
    • http://reactivascotia2020.com/game_captain_tsubasa_ps2_di_androido9p4o.pdfIn PDF document text
    • http://characduwe.space/education._com_worksheets_mathhvwz1.pdfIn PDF document text
    • https://cdn.sqhk.co/fegibidizog/hidSFje/33121822990.pdfIn PDF document text
    • http://roxifij.22web.org/53935940495.pdfIn PDF document text
    • https://ladetizor.weebly.com/uploads/1/3/4/7/134731735/abca3db5dd5.pdfIn PDF document text
    • http://sakulog.sportsontheweb.net/what_is_the_role_of_systems_engineer_in_infosys.pdfIn PDF document text
    • https://tabutepapuwup.weebly.com/uploads/1/3/0/7/130740025/3619663.pdfIn PDF document text
    • http://hookup153.fun/bosch_dishwasher_shx3ar75uc_partsn4wdj.pdfIn PDF document text
    • https://cdn.sqhk.co/reriwoduriju/ihiikge/happy_wheels_full_game_unblocked_online.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gixuzunafijid.epizy.com/6253545695.pdfIn PDF document text
    • http://zusaxadixuxot.myartsonline.com/rakujesozukebunobafirevi.pdfIn PDF document text
    • http://vevisadoko.epizy.com/how_to_play_mutants_and_masterminds.pdfIn PDF document text
    • http://magonusu.epizy.com/format_sql_query_sql_developer.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

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_off0000e4f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F6 5260 bytes
SHA-256: 06f6084517b328514146e244ead5b3dfed79bbc796fe237273ac1de17423e683
font_01_sfnt_off0000f6df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DF 11004 bytes
SHA-256: b6f995792b88d3e28f88db46594c7c62759c4e4f158f3df5d41b3f58345b587e

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