Malicious PDF — malware analysis report

Static analysis result for SHA-256 50044721904a61f7…

MALICIOUS

PDF

95.1 KB Created: 2021-03-25 16:44:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 7820806133e5b03bb70dbe81378b1775 SHA-1: 6bd601f7fc09e780abd49ce1777d13aa8dc219f6 SHA-256: 50044721904a61f7c7964e41e8c0499dd0727224fd6aae99f0fc3a176405681c
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of numerous external URIs, many hosted on disposable domains or link farms, suggests a phishing or scam campaign. The document body, though truncated, contains keywords related to a 'California residential purchase agreement', which is likely a lure to trick users into interacting with the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://kuzutuzo.ru/wix?keyword=california+residential+purchase+agreement+revised+12%252F18 PDF link annotation
    • https://newimogo.weebly.com/uploads/1/3/1/0/131070302/98e0c6.pdfIn PDF document text
    • http://smartradiobf.ru/rupuludoberevitovodeldh1vv.pdfIn PDF document text
    • https://cdn.sqhk.co/migawudewiw/gcTUsha/gufuxusasitixajafazuzivor.pdfIn PDF document text
    • https://cdn.sqhk.co/sawomunuj/bbhhdid/lezufazenibilog.pdfIn PDF document text
    • https://juwujumatel.weebly.com/uploads/1/3/4/0/134042908/266b7c.pdfIn PDF document text
    • http://instacopyrighthelpteam.com/litumugenofuyeuc8.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/dpFNDji/define_strategic_human_resource_management_system.pdfIn PDF document text
    • http://xujaxul.mywebcommunity.org/wezogerixomuvigizapezuje.pdfIn PDF document text
    • http://napufokotipo.getenjoyment.net/buxeviwanife.pdfIn PDF document text
    • http://scm03.ru/mma_fighting_clash_uptodown79gxv.pdfIn PDF document text
    • http://pasikufopubiwo.mypressonline.com/64408570737.pdfIn PDF document text
    • http://ubzvp.com/allregs_fannie_mae_servicing_guide45lar.pdfIn PDF document text
    • https://munojafejim.weebly.com/uploads/1/3/0/8/130874523/fcc711c3c0ea5.pdfIn PDF document text
    • https://gareketekefebon.weebly.com/uploads/1/3/4/6/134695024/xusodedujiro-wulagowurovo.pdfIn PDF document text
    • https://wobomiti.weebly.com/uploads/1/3/4/5/134501920/c25c2c6d2d7770e.pdfIn PDF document text
    • https://cdn.sqhk.co/lifupowaseli/7idJcgi/6429045562.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kigagizotag.onlinewebshop.net/short_english_story_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/military_alphabet_list.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/12966244666.pdfIn PDF document text
    • https://69cf8a46-0d3d-4b71-8fd1-93df925da18e.filesusr.com/ugd/e4064d_16d219472b27445dbc96f8e64dfc4380.pdf?index=trueIn PDF document text
    • http://gapoxuvopa.onlinewebshop.net/the_most_popular_game_companies.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/angadi_theru_single_part_hd_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/the_story_of_oj_lyrics_az.pdfIn PDF document text
    • https://f395d2f2-f939-483b-815f-81062d4747ff.filesusr.com/ugd/be2697_f7b13121b1a447cf9edaf8750035ffad.pdf?index=trueIn PDF document text
    • https://9c33b4df-6f14-41ad-9e94-a3a23f7ed20d.filesusr.com/ugd/2a975f_8b2ef3873ea447d1932d56acccf51d4d.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000119cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119CF 5948 bytes
SHA-256: 10846792f3feb2269bd54cfc19d7e4af81c79fcdc83738823286d3dd413ff933
font_01_sfnt_off00012dfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DFE 12520 bytes
SHA-256: 0af1f06d3b828c098a404065da7e35678d5e2b357c268a43687b3ddc9f8aa662
font_02_sfnt_off000158a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158A6 16140 bytes
SHA-256: 00468df452218f546d59995a7cf9b4297092e2fd476dbd2f6ce79846bd051107