Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d9573ee0abde716…

MALICIOUS

PDF

89.0 KB Created: 2021-03-23 13:50:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8dcfc8aba472c29901b3588f28d1d126 SHA-1: 5ce29f90efc0733c1e017e5d260514d0b70ca1db SHA-256: 7d9573ee0abde716f2f1bde5df0e54f0f839af10f895ea3fc60699db66bd3fd8
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=fancy+pants+1+remix+unblocked PDF link annotation
    • https://jewupoma.weebly.com/uploads/1/3/1/4/131437657/juresasinono_pamobow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475383/normal_604110673508b.pdfIn PDF document text
    • https://cdn.sqhk.co/zumedizojas/gevtWjh/top_speed_car_stunts_formula_car_games_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418167/normal_6008e0660983d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368782/normal_60481f98acf64.pdfIn PDF document text
    • https://cdn.sqhk.co/futipujorup/Gidhghg/xabakadepofumaposerosego.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvevalor/ibzijic/dangerous_shark_attack_beach.pdfIn PDF document text
    • https://cdn.sqhk.co/gotakavapu/igdLIwD/23709084860.pdfIn PDF document text
    • https://wufowidujexo.weebly.com/uploads/1/3/5/2/135293423/napimapamef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449178/normal_604150e620381.pdfIn PDF document text
    • https://bamegipizof.weebly.com/uploads/1/3/4/6/134647446/kiduguwal-xiporirobofok-nategewelutir.pdfIn PDF document text
    • https://betebawaxudu.weebly.com/uploads/1/3/5/3/135388356/pofawezidaro-kisemebux-kexuvodasipeke-nopedem.pdfIn PDF document text
    • https://cdn.sqhk.co/dinigivo/eiaPGjc/download_basketball_match_videos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_602c58724d4ee.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c8a164a7-2549-4056-b209-d27d417f800b.filesusr.com/ugd/136d3d_7f7de4b961584b60890039aaa9c71935.pdf?index=trueIn PDF document text
    • https://64e18f06-8a0e-4dc1-8427-9dd81b4bff36.filesusr.com/ugd/baa514_f65e2b08aa504d08981f46973fccbcb0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ecdb372-82fc-483e-9b88-66995ad1c1a7/child_of_god_hill_song_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/352c8701-b824-4dbe-bb91-9f9ffcbd747a/nowuvivanevekitobepamegu.pdfIn PDF document text
    • https://da550aaf-34ae-4f9b-ad82-7836b82beebe.filesusr.com/ugd/a203e6_8ac3ecd86e554140bb64d60e73b4cb2f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c8d20bd-2788-4c1a-a5f3-fb45b0270c7e/why_is_my_nest_not_turning_on.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6926d3df-90e1-4dbb-a77f-f001ebc97e45/lab_report_example_biology_osmosis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee1e4c5f-13f1-4336-b469-763c66fe83d5/nc_state_computer_programming_certificate_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb156344-b075-4df2-a42c-25d95d519f9e/what_is_the_price_of_a_liftmaster_garage_door_opener.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_off00011ba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BA8 5600 bytes
SHA-256: fa05206c84c3652dcde0d5907405ce9769920335b9037c9c583bd83d0e34ad2d
font_01_sfnt_off00012ead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EAD 11784 bytes
SHA-256: de90c2a0292c371cd8008ba5422dee1ed5b4273bf2fb7dbd3a33bc89b6f784bf