Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ea68022a65ffff6…

MALICIOUS

PDF

78.1 KB Created: 2021-04-08 18:25:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f0597f90998d654d3d1915ca0c858d1 SHA-1: 6225d883a5d892080965c1dfe773f82b2a630c44 SHA-256: 3ea68022a65ffff62ceb595c02dae34e5676eb46e8f65dba560422ad405c747d
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, suggesting it is part of a link farm or phishing campaign designed to redirect users to malicious websites. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest the document's purpose is to drive traffic to external sites, potentially for malware distribution or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/strik?utm_term=best+mystical+books+to+read
    • https://static.s123-cdn-static.com/uploads/4465018/normal_5ffd805f0fc42.pdf
    • https://cdn.sqhk.co/pigexebobe/hamVgjZ/vigutofurebimobokik.pdf
    • https://cdn.sqhk.co/sesijisova/46Mvagg/red_ball_4_unblocked_volume_4.pdf
    • https://cdn.sqhk.co/serodozire/h3jYieF/fagebolov.pdf
    • https://static.s123-cdn-static.com/uploads/4452865/normal_5fee1451c32d8.pdf
    • https://cdn.sqhk.co/temirikuji/dgjTsco/ralphs_pharmacy_marina_del_rey_lincoln.pdf
    • https://cdn.sqhk.co/juzosugun/ihhhcvB/green_bubble_tip_anemone_closed_up.pdf
    • https://cdn-cms.f-static.net/uploads/4467027/normal_60145f1f5d93f.pdf
    • https://cdn.sqhk.co/bikugipozamu/ql5TEgg/fire_engine_siren_sound_youtube.pdf
    • https://cdn.sqhk.co/nixivezez/dCieojc/jibiwiposolosugurusonot.pdf
    • https://cdn.sqhk.co/xuwolupenilu/hDGhdb8/51913040151.pdf
    • https://cdn.sqhk.co/lixozimiz/gKicxmv/bharti_axa_life_insurance_motor_claim_form.pdf
    • https://cdn-cms.f-static.net/uploads/4502493/normal_604cc0c838165.pdf
    • https://cdn-cms.f-static.net/uploads/4454990/normal_5fe6cfb3aa44c.pdf
    • https://cdn-cms.f-static.net/uploads/4420765/normal_604d0b64dee18.pdf
    • https://cdn.sqhk.co/liritefebat/fD11Dia/fuzewiwogowulufekipowosu.pdf
    • https://cdn-cms.f-static.net/uploads/4487665/normal_60438c5d2f9d3.pdf
    • https://static.s123-cdn-static.com/uploads/4479236/normal_5fe1abcbd8518.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://01c4c9a3-ee74-4db9-a65d-799443b8dbf1.filesusr.com/ugd/a64c8c_6ef9c321d5324d488aaa9709d84e7e7a.pdf?index=true
    • http://lilivuxaja.rf.gd/short_adventure_stories_in_english_for_class_8.pdf
    • https://c78ffd2e-fc3d-4272-86ca-968d835fb7ad.filesusr.com/ugd/0f9ef0_ab1d9c30a364449d9000004c2c2b4885.pdf?index=true
    • http://ripajadiw.rf.gd/cuisinart_one_cup_grind_and_brew_coffee_maker_review.pdf
    • https://8d90b851-447f-4cfc-ac95-1e867b71b983.filesusr.com/ugd/b371d9_87a05cf8da084c0c9ab16f9af923f298.pdf?index=true
    • https://fa3f2985-242d-4a4c-93c0-6adbfb259eaf.filesusr.com/ugd/8dbe7a_be3fd5d7562440ab8924315b2a5eed60.pdf?index=true
    • https://8ed7b8cb-9bae-4def-ad9b-66b28cd11f91.filesusr.com/ugd/740d8c_59a322a7313d4f8f8849f51e9ab1b490.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5b7.bin
39a17628bdb56a52a4182e8d80dca5776dec1198e1189b91d2664a4ce5161073		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B7 5120 bytes
font_01_sfnt_off0000f720.bin
29ba2616e1e15ec228203801b557950088f4d408a072e9f34d3b6a3b958a3d78		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF720 10576 bytes
font_02_sfnt_off00011b2b.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B2B 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.