Malicious PDF — malware analysis report

Static analysis result for SHA-256 203116a297eb0f54…

MALICIOUS

PDF

82.0 KB Created: 2021-03-15 19:59:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 783378574417ab61ac0a9171806d8da4 SHA-1: 219eaae3f949e8205758f3b29d3f822b70557eb2 SHA-256: 203116a297eb0f54a1cace08cc55a5e069b62102490470fe89469087c330fc72
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting a link farm or phishing attempt. The primary malicious URL identified is https://jumiwimov.ru/wix?keyword=.ova+and+.ovf+virtualbox, which likely serves as a lure to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wix?keyword=.ova+and+.ovf+virtualbox
    • http://cocobeautybar.ca/hitman_2_sapienza_sniper_assassin_suit_onlyuk5ce.pdf
    • http://unonatur.space/soar_que_se_caen_los_dientes_y_muelastv5gf.pdf
    • http://avto-trokot.xyz/omicron_test_universe_software7l56g.pdf
    • http://jewlgems.com/bajrangbali_ka_wallpaperlgb5s.pdf
    • http://xegazinijitup.mywebcommunity.org/45956447279.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://rilexukalenenig.rf.gd/80812609778.pdf
    • http://vesedakowata.onlinewebshop.net/67620037878.pdf
    • https://4b0cdf75-2e42-4830-99f1-bbdbaec3f661.filesusr.com/ugd/891219_276241cb69014a548e504120acd0fa90.pdf?index=true
    • https://4eb83289-b313-4542-b68c-79a1d4783db4.filesusr.com/ugd/f6336d_28b85935e8134bfc85db992e96e46dad.pdf?index=true
    • https://ab25a8b3-4d80-4d4b-93a1-c1347014fa7c.filesusr.com/ugd/8d0191_49f041a5f80d47908431ea7e81dba42c.pdf?index=true
    • https://2e03c77f-99cc-4591-9807-54d8d49c9ce6.filesusr.com/ugd/759733_d9f53300e00c4258979bd35a45cbd910.pdf?index=true
    • http://jujalun.rf.gd/front_end_estimation_multiplication_worksheets.pdf
    • https://24451074-f53b-4065-993c-779ba3957988.filesusr.com/ugd/0ae25f_5e68f42e01ae4ec8b36f1da2cbe1db69.pdf?index=true
    • https://86b7bb9a-6a0b-496c-a062-e8aa60c365d0.filesusr.com/ugd/dcf311_2b972c94e2c540e995c1bad969a41bca.pdf?index=true
    • https://9df6fdd8-df71-43fb-87ad-b121b2de7416.filesusr.com/ugd/e0d0cf_a2946e88ccd74a96b3da99f5379fc2a3.pdf?index=true
    • https://4eb83289-b313-4542-b68c-79a1d4783db4.filesusr.com/ugd/f6336d_14273cf547304cf3b7830e9a06eea775.pdf?index=true
    • https://s3.amazonaws.com/xakajoziwibi/dozutubinezuvedat.pdf
    • http://dopovis.myartsonline.com/drogas_colinrgicas_y_anticolinrgicas.pdf
    • https://s3.amazonaws.com/litunux/49861816150.pdf
    • https://0029f817-bcb8-4d21-890d-ce21d4a4252d.filesusr.com/ugd/bae363_adcee3b7411442409cdb131b839aee12.pdf?index=true
    • https://46c0acaa-de7d-4f46-84f0-c2cf1d8ff7d9.filesusr.com/ugd/ac1638_ed26875653884642a514ab66ad795155.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5e7.bin
7bec16ce7d269b3659beef1d9e4d72d574d751693070cb2924b2cfd3eab06843		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E7 4928 bytes
font_01_sfnt_off000106c7.bin
e5bce22d659039bc8f38094c8a98bbd1c7dae71e45433f989017c5e033e300f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106C7 16116 bytes

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