Malicious PDF — malware analysis report

Static analysis result for SHA-256 672f1ad81b540831…

MALICIOUS

PDF

162.8 KB Created: 2021-03-20 19:16:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: ee23845597ffdf7facec3931c4ab7a17 SHA-1: c32b24420990e5574a7a5fc25375352a876c695d SHA-256: 672f1ad81b540831ee1f56e35f64154afd3acf55d0007612fdddcca7df2d5b13
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ClamAV as a phishing trojan. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, appears to be a lure related to search terms, directing users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://lozipotod.ru/award?keyword=namakam+chamakam+lyrics+in+telugu+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4466166/normal_604eb70d75d2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471941/normal_604f353052433.pdfIn PDF document text
    • https://cdn.sqhk.co/tawavumazo/iiherbm/wibumanamebinovaredusu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421939/normal_5fdc4cd44fc46.pdfIn PDF document text
    • https://cdn.sqhk.co/pugipepa/jjghgiD/video_lagu_agnes_monica_rindu.pdfIn PDF document text
    • http://delufarado.22web.org/29194337061.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427094/normal_604aab41d2391.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403259/normal_5ff8ff8835954.pdfIn PDF document text
    • http://copyrightshelpcenter.com/how_do_i_turn_the_alarm_off_on_my_g_shock_watchhtlvi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393035/normal_603bdc81d8791.pdfIn PDF document text
    • https://cdn.sqhk.co/kuluxasoge/9haXvIQ/vmware_horizon_client_login_failed.pdfIn PDF document text
    • https://cdn.sqhk.co/zanotunuzi/bjajgtm/how_to_set_up_my_verizon_online_access.pdfIn PDF document text
    • http://tuworiki.22web.org/nevonumezozusajo.pdfIn PDF document text
    • https://cdn.sqhk.co/zomidami/kjeijTX/ethical_guidelines_for_animal_research_in_psychology.pdfIn PDF document text
    • https://cdn.sqhk.co/sewujuzanas/HjchjE2/rapunzel_castle_name.pdfIn PDF document text
    • http://health2health.online/mitologia_celtasxmr9.pdfIn PDF document text
    • https://cdn.sqhk.co/kutajanode/MgeQBvI/sniper_shooting_games_for_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404133/normal_5ff4d9298b9b8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489237/normal_6006b839233c6.pdfIn PDF document text
    • https://cdn.sqhk.co/lididiregi/gjh8Vq6/alone_images_girl.pdfIn PDF document text
    • http://iuts.space/bobuwildbxin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://logovejewuwofe.rf.gd/70799671233.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000184a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x184A9 5704 bytes
SHA-256: 3dc871821cf09a1cf9fdd491ce28193dd441458dc22b2b29d71df9c5e77cb067
font_01_sfnt_off00019801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19801 2140 bytes
SHA-256: bd0784ee9876bc41ae9331b4caf9baef264e0407ad23fd824191b90179f213f9
font_02_sfnt_off0001a172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A172 86000 bytes
SHA-256: ae635e9527477d5902a964d545b0299dc848b0b3023a79e3fe8f7569a979a2df
font_03_sfnt_off0002352d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2352D 11356 bytes
SHA-256: 0ef8a40a2990a7c932077ed7e1e576c50d505d25bbf37780b9a8e37ef53afbec
font_04_sfnt_off00025b31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25B31 16060 bytes
SHA-256: d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7
font_05_sfnt_off00027005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27005 2972 bytes
SHA-256: 98b1dc2c9753350417c3e415a62aea3f6035bce9f7a5e95169a5289bd4ade3f3