Malicious PDF — malware analysis report

Static analysis result for SHA-256 adc3bd0f8c7dd21f…

MALICIOUS

PDF

84.6 KB Created: 2021-04-17 11:12:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2a803a8b8856ebb385b2c0b3041f2d8b SHA-1: 2140e712ff88b64a15aace9cbe4f25d822838192 SHA-256: adc3bd0f8c7dd21f39123bba3c9339fbec00ecf537f35219bc8074eff037c4ce
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with heuristics indicating it functions as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. The presence of external URIs and the PDF structure point towards an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://ponafet.ru/strik?utm_term=philosophy+books+for+beginners+in+hindi PDF link annotation
    • http://natiral.space/ghanaian_live_worship_songs0tzd5.pdfIn PDF document text
    • https://loneluripovulom.weebly.com/uploads/1/3/4/3/134364014/5800015.pdfIn PDF document text
    • https://bukivobiwizu.weebly.com/uploads/1/3/4/0/134097020/2599262.pdfIn PDF document text
    • https://cdn.sqhk.co/xamewivuvus/gggZJib/java_8_version_181.pdfIn PDF document text
    • https://cdn.sqhk.co/zeburozupax/gbAOhf7/manatosim.pdfIn PDF document text
    • http://alexandreablog.com/2007_chevy_impala_ss_battery_replacementw5ewa.pdfIn PDF document text
    • https://cdn.sqhk.co/rikopekela/cifuhbM/hide._me_vpn_apk.pdfIn PDF document text
    • https://muxavitegujun.weebly.com/uploads/1/3/1/6/131637584/zopajazomi.pdfIn PDF document text
    • https://ratudizog.weebly.com/uploads/1/3/5/3/135323835/resonosesupasogo.pdfIn PDF document text
    • https://vupagivoro.weebly.com/uploads/1/3/4/3/134314863/dcc3f52ca9.pdfIn PDF document text
    • http://idem-peshkom.ru/vofevosakabasegegawejilwbkq.pdfIn PDF document text
    • http://car-test.pro/tapoziwilajudomitikotoguwd9md.pdfIn PDF document text
    • http://chambrely.xyz/58889037237wyz5y.pdfIn PDF document text
    • http://nigma24invest.online/39733576121ygdst.pdfIn PDF document text
    • http://pokypka.xyz/jojizoxavovurova3lk0.pdfIn PDF document text
    • http://vovpomnim.ru/what_is_the_purpose_of_experimentation_within_the_steam_experience242fr.pdfIn PDF document text
    • http://idealicaitalia.website/542302560077spvh.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/50418e98-1d7e-4a1a-baf1-39945da3adb3/confessions_of_a_shopaholic_full_movie_watch_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/929726113.pdfIn PDF document text
    • https://s3.amazonaws.com/futamo/pimiduwakibasawetujaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14d85899-041e-41ef-9d3f-9cba0851b10c/86539321107.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/371fe4e1-7532-4bc6-89f0-eaadb2d288ce/33840686929.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
stream_004_off000126ff.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x126FF 8416 bytes
SHA-256: dc246da21e81f6b97388be46b964bf7de321e1547559ad990efdb853c83870c4
font_00_sfnt_off0000f11a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11A 5400 bytes
SHA-256: 05772628e4dc8cfcb76b5c8fd24e2521e39b0f5d47a5aa6a23cb6eaceaa33b73
font_01_sfnt_off00010377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10377 10368 bytes
SHA-256: 60727611f1f83c642b7da63c0ab46351f05d865ff26890bfb3b88a33dbc8a681