Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a9c30171eb93668…

MALICIOUS

PDF

72.7 KB Created: 2021-03-28 17:47:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: d0ebd23759f535921e839b5997b690bf SHA-1: 1d93c2413e30f08bd6d99ad7f9be0a0d3f60e8e3 SHA-256: 5a9c30171eb936684ebe65fdeae7a53471758f1c2d113f05bea245eea7544f49
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many hosted on disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, appears to contain a lure related to syncing an Xfinity remote, directing users to a suspicious URL. The presence of embedded URLs and the overall structure suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/strik?utm_term=how+to+sync+xfinity+xr11+remote PDF link annotation
    • http://theboldpantsproject.com/dewagibugopukesotexifunelhncal.pdfIn PDF document text
    • http://reassurez-moi-fr.info/how_to_fix_ul_code_on_cabrio_washer7pfrl.pdfIn PDF document text
    • http://gonzo-3d.com/larugifuvoxufufqlai.pdfIn PDF document text
    • https://nopumalazaf.weebly.com/uploads/1/3/0/8/130813483/lolulo-nopadaxipam-vataf.pdfIn PDF document text
    • https://busedulaxuxelo.weebly.com/uploads/1/3/1/3/131379622/babudipavox.pdfIn PDF document text
    • https://ruzudafuzozuxu.weebly.com/uploads/1/3/4/8/134847081/4030490.pdfIn PDF document text
    • https://cdn.sqhk.co/lobinazema/QgdSVkh/62004036007.pdfIn PDF document text
    • http://getveran.site/is_brother_printer_airprint_enabledzf8b9.pdfIn PDF document text
    • https://muxavitegujun.weebly.com/uploads/1/3/1/6/131637584/5664722.pdfIn PDF document text
    • https://fizijoju.weebly.com/uploads/1/3/0/8/130814030/kuxawavotalaf.pdfIn PDF document text
    • http://kdghy.online/hanuman_song_dj_mixml9ll.pdfIn PDF document text
    • https://xuzopodoker.weebly.com/uploads/1/3/0/7/130738955/7da1576042c3.pdfIn PDF document text
    • https://sebikiwar.weebly.com/uploads/1/3/5/9/135962157/6779734.pdfIn PDF document text
    • https://cdn.sqhk.co/mafokesaxuvi/hghA3Zi/credit_card_revealer_app_for_iphone.pdfIn PDF document text
    • http://fufodew.22web.org/dobuluzano.pdfIn PDF document text
    • https://kibepujuvug.weebly.com/uploads/1/3/4/6/134644113/aedc3741.pdfIn PDF document text
    • https://falumegobe.weebly.com/uploads/1/3/4/7/134702986/jakil-mopamizapasu.pdfIn PDF document text
    • https://cdn.sqhk.co/diwewiduvaz/bgdjgfb/oceanhorn_2_latest_mod_apk.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/5b459e2b-2db4-44ff-850d-9e2105f22146/how_to_wind_a_bobbin_old_singer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77667fab-4b47-475b-991f-638d3195f26a/les_miserables_i_dreamed_a_dream_violin_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f248608-0a42-40d9-a79e-8e96264d95e5/how_much_do_trampoline_parks_make.pdfIn PDF document text
    • http://nenexotaz.rf.gd/bepejaxewomijataxus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79695a95-83b5-4da8-a8e6-c9da639ef579/june_chandler_schwartz_today.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df1f6ac4-5f64-451f-8d43-e67f840bd9e9/48838344791.pdfIn PDF document text
    • http://wisunomimat.epizy.com/swearing_emoji_android.pdfIn PDF document text
    • http://pubupetedibu.rf.gd/middlesex_jeffrey_eugenides.pdfIn PDF document text
    • http://puwirosefifoxa.rf.gd/birojewawasarabi.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_off0000d2b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B3 4848 bytes
SHA-256: 0a381a3e9a01abc29d69efb78d65ca3c1ad46d304843e5be0e6df5ce1694d7d5
font_01_sfnt_off0000e327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE327 10520 bytes
SHA-256: 502b2d732f38555d68d54cf65b8f9d9f02fa70bfa4c161704c7a78412f7bf423
font_02_sfnt_off000106ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106EF 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3