Malicious PDF — malware analysis report

Static analysis result for SHA-256 213c2a0ff6314ac3…

MALICIOUS

PDF

80.6 KB Created: 2021-05-04 14:26:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c338894ac856e5f96d652e46f377ba45 SHA-1: 22766da03d970742dd32606615da2eac2ff6a0ef SHA-256: 213c2a0ff6314ac304d9614dd73e5ea31c703ec7174fb74312c9b2d0da7c7e7c
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized and point to benign-looking documents, suggesting a link farm or SEO poisoning tactic. One of the primary external URIs, 'https://jottigo.ru/strik?utm_term=fagor+washing+machine+f02+error', is likely a lure to a phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/strik?utm_term=fagor+washing+machine+f02+error PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372073/normal_60580539b4bb6.pdfIn PDF document text
    • https://cdn.sqhk.co/zafupusapun/W4jgyie/enemy_strike_3_para_android.pdfIn PDF document text
    • https://nukogakulezov.weebly.com/uploads/1/3/1/3/131378840/011f2473000.pdfIn PDF document text
    • https://cdn.sqhk.co/vutexexukus/ejhTNji/hello_ice_scream_freaky_neighbor_horror_game_3ds.pdfIn PDF document text
    • https://pesudimudoselu.weebly.com/uploads/1/3/2/6/132681392/511083.pdfIn PDF document text
    • https://jinugavov.weebly.com/uploads/1/3/4/4/134438703/d7378c.pdfIn PDF document text
    • http://jinobuzid.scienceontheweb.net/aged_care_award.pdfIn PDF document text
    • https://cdn.sqhk.co/lovaxixifew/hjIicRF/xetanivigowubiwab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385217/normal_5fd67978620fc.pdfIn PDF document text
    • http://watogoda.mypressonline.com/where_can_i_find_sat_practice_tests.pdfIn PDF document text
    • https://cdn.sqhk.co/nomitusibop/ha7hghg/drum_set_notation_key.pdfIn PDF document text
    • https://sofofiwolasaxu.weebly.com/uploads/1/3/1/8/131856039/vadifulodutali_dipixaritu_xamapurip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447640/normal_602dc63f2aabf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422914/normal_600e9e6681601.pdfIn PDF document text
    • http://jabudapitu.scienceontheweb.net/dk_french_english_bilingual_visual_dictionary.pdfIn PDF document text
    • https://cdn.sqhk.co/dawupana/cidgVgS/goal._com_live_transfer_news_update.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462046/normal_603174ade5c75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471474/normal_5fd65324ac66a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421983/normal_5fd3b996418c3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/divexikav/graco_duetconnect_lx_multi-direction_baby_swing_and_bouncer_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/64929280965.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/asus_p6x58d_premium_specs.pdfIn PDF document text
    • http://dokudaruriwiv.atwebpages.com/ryobi_bench_top_drill_press_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/ludlow_cattle_market_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/dufuneneritukavose.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE6 5584 bytes
SHA-256: 72be08e234468d6db2a50c559fdd53d3a632d04f9210cf78e8b0bf5a1e6b26a8
font_01_sfnt_off00010ed5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED5 10592 bytes
SHA-256: 35847921d1f233b0ee582dbc0591776d242487757623fbce1452a30ced29d40b

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