Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f80f6db90af6cf6…

MALICIOUS

PDF

80.7 KB Created: 2021-03-17 10:24:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0416e336253ba8006571db2ea7f16ac SHA-1: 143473467c7defbce2f1c588647e435d67315132 SHA-256: 4f80f6db90af6cf61750b3d19df1e09dec0db40a78418be7398d7afaff866db0
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a significant number of external links, forming a link farm, with the primary URL being 'https://botokaw.ru/wix?keyword=download+riptide+gp+renegade+apkpure'. This suggests the document's purpose is to redirect users to potentially malicious websites, possibly for further exploitation or phishing.

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://botokaw.ru/wix?keyword=download+riptide+gp+renegade+apkpure
    • https://fijesawe.weebly.com/uploads/1/3/4/6/134630878/5042985.pdf
    • https://static.s123-cdn-static.com/uploads/4385235/normal_5fee7b6a0ed73.pdf
    • http://kedugobepuged.mywebcommunity.org/bimaginetu.pdf
    • http://wubowobipevoto.mywebcommunity.org/11357100439.pdf
    • https://cdn-cms.f-static.net/uploads/4425214/normal_604a859ed05a8.pdf
    • http://korogesubelokut.mypressonline.com/26260029667.pdf
    • https://fojulivopex.weebly.com/uploads/1/3/4/7/134718782/mebavupizigogezira.pdf
    • https://bujefodamefizup.weebly.com/uploads/1/3/1/0/131070612/wonisopa.pdf
    • https://cdn-cms.f-static.net/uploads/4428069/normal_5fe7354782c2f.pdf
    • http://sewatumafuta.medianewsonline.com/how_to_write_a_5_paragraph_essay_for_6th_graders.pdf
    • https://murasujudadalox.weebly.com/uploads/1/3/5/3/135338307/mememorefovunakiwa.pdf
    • https://migawonakizize.weebly.com/uploads/1/3/1/6/131637147/8585648.pdf
    • http://joritirumag.mypressonline.com/motorola_cp200_service_manual.pdf
    • https://bokusisosi.weebly.com/uploads/1/3/0/7/130775109/6599640.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ae9760b3-2396-465c-a08d-3a4282a0afde/68811727340.pdf
    • https://uploads.strikinglycdn.com/files/21efdada-a3a3-4752-aaa6-eb1359f35e1d/maytag_front_load_washer_neptune_manual.pdf
    • https://uploads.strikinglycdn.com/files/6705a99a-4411-4afa-9a66-238103f275c7/craftsman_1_2_hp_garage_door_opener_remotes_dont_work.pdf
    • http://wugujub.onlinewebshop.net/fibijinurulimed.pdf
    • https://uploads.strikinglycdn.com/files/6b40ea9b-e0da-4361-a014-952d629500c5/how_to_use_ifit_activation_code.pdf
    • https://uploads.strikinglycdn.com/files/cbcd689b-c907-49f5-a310-1b5a3ef94683/bijupa.pdf
    • http://sogivuwe.onlinewebshop.net/psalm_23_4-6_kjv.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_off0000f33e.bin
fcc8a204b8db98b0c8ba8208c9901be4ca24875a70eb0e2e69bcdb6d1e2c7a19		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF33E 5104 bytes
font_01_sfnt_off000104c8.bin
334df3ca140a714777cacab7c891f46f0d837a463a8dfdb39adceae6d8d71eba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104C8 21600 bytes

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