Malicious PDF — malware analysis report

Static analysis result for SHA-256 6929650ff6f7750d…

MALICIOUS

PDF

72.6 KB Created: 2021-03-16 08:29:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5300f58226232ea73bc83f81db52dcf9 SHA-1: 74ec7f37c7f8346a72299a3788f498f50c87e5a9 SHA-256: 6929650ff6f7750db10de057ee629c2cc7e001848476f17dd27d935ba8e64dec
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic flagging it as a link farm. One prominent URL, 'https://maypoin.ru/wix?keyword=cube+world+how+to+tame+pets', appears to be the primary lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or a scam. No scripts were extracted, but the structure suggests an attempt to drive traffic to malicious or deceptive websites.

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://maypoin.ru/wix?keyword=cube+world+how+to+tame+pets
    • http://wapurejav.22web.org/business_opportunities_in_africa.pdf
    • http://look-hotel.com/85704682147de3ui.pdf
    • http://italysummer.space/zimetuwofadosafiwesutuxiwbrasz.pdf
    • http://ceter.xyz/rayovac_battery_charger_green_lightrjhjf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://6d5fec37-5936-4ae8-8938-03a86e982f09.filesusr.com/ugd/d4da64_ee09fd1bd54a40159a97db8b8a2d0d29.pdf?index=true
    • https://s3.amazonaws.com/biwubeleba/fnma_guidelines_on_student_loan_payments.pdf
    • https://s3.amazonaws.com/jojitagifuva/97415310411.pdf
    • https://1cbf0fd9-62af-4102-a3dc-982f361539e7.filesusr.com/ugd/bfbc46_bd1a348f477c4cb4bcf0eda333e70d62.pdf?index=true
    • https://s3.amazonaws.com/nedijowewoded/pulokepoki.pdf
    • https://uploads.strikinglycdn.com/files/c14ac877-1a2e-48a3-9030-411551507ed4/vocabulary_test_multiple_choice_questions.pdf
    • https://d6b7b3c7-8429-4d82-9d75-5d5d09e763cc.filesusr.com/ugd/a8c229_8427800abcf64d9883062d88d6140889.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5a486f86-f2e3-4b33-bb91-c2e8cf7c2173/91336562462.pdf
    • https://3c8d80e7-2998-4b53-b1db-ea2053e4eee2.filesusr.com/ugd/5c8c55_d7e99268cdae4411a57fd0b4d4e43f20.pdf?index=true
    • https://7031c68c-cf47-488c-b9bd-b344696616f5.filesusr.com/ugd/51e9e9_b499d410de344c6480f64348e2fad87c.pdf?index=true
    • https://s3.amazonaws.com/pesetufavo/actigraph_gt3x_manual.pdf
    • https://s3.amazonaws.com/jexijer/employment_verification_request_letter_format.pdf
    • http://lukoleni.epizy.com/awdhesh_premi_gana_bhojpuri_video_hd.pdf
    • https://uploads.strikinglycdn.com/files/f2ee07fd-97ea-4590-8cfa-0f36d3a463d8/zojirushi_home_bakery_supreme_bread_maker_bb-cec20_manual.pdf
    • https://6bc61794-ec17-45f1-96eb-8bed4cd57308.filesusr.com/ugd/217b8a_53f734455d824f8eaabc23f5a0892a1d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5c7eae77-af60-4a29-8bc2-9c7ea1465e5e/power_probe_3_price.pdf
    • https://uploads.strikinglycdn.com/files/c9ec0cea-f1ff-417a-bc9b-95f5e560feea/futad.pdf
    • 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_off0000e134.bin
6840acd4442c8195a802248b9459c4b55820df9b260270882f9b612b7438a7be		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE134 5336 bytes
font_01_sfnt_off0000f329.bin
860941976d0b35d2ca024bc6407b2f884dc3792fc2fa5b4b21a010675282734d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF329 9912 bytes

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