Malicious PDF — malware analysis report

Static analysis result for SHA-256 696cc533a9f8f275…

MALICIOUS

PDF

76.4 KB Created: 2021-03-14 02:31:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: a8326921afd81ba5d7815cd15d15a09a SHA-1: a9f67bab9a8b7c8fed4e36384ac34ce2011ff900 SHA-256: 696cc533a9f8f275e20446e3d8ee38432991c0a18ea16c95f79670a02f8ee2b0
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to SEO-optimized PDF link farms. The document body, though heavily obfuscated, contains keywords related to search terms, suggesting a lure for SEO spam or phishing. ClamAV and ML classifiers confirm its malicious nature, specifically flagging it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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=swtor+sentinel+build+2020 PDF link annotation
    • https://dapobirot.weebly.com/uploads/1/3/4/8/134888013/xiramakimil-liximokuv-giwuvumog-migukuxazedoke.pdfIn PDF document text
    • http://xonitaj.mywebcommunity.org/national_achievement_test.pdfIn PDF document text
    • http://mirijesuwakug.sportsontheweb.net/34359141222.pdfIn PDF document text
    • https://kazimiposaduvab.weebly.com/uploads/1/3/1/1/131163956/8493920.pdfIn PDF document text
    • https://cdn.sqhk.co/gulifunanale/Seiihfn/seduxajugerejadunibipowo.pdfIn PDF document text
    • https://lemagijazifar.weebly.com/uploads/1/3/2/7/132710763/2255852.pdfIn PDF document text
    • https://cdn.sqhk.co/zidezofa/YgcBidz/12394227420.pdfIn PDF document text
    • https://cdn.sqhk.co/wabajevebe/fhjVBif/crowd_control_beer_calories.pdfIn PDF document text
    • http://tupaxeguna.scienceontheweb.net/how_do_you_reset_a_whirlpool_duet_front_load_washer.pdfIn PDF document text
    • https://rupevegix.weebly.com/uploads/1/3/4/8/134887155/dab25bf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/benjamin_button_book.pdfIn PDF document text
    • https://s3.amazonaws.com/pekatikisuruki/rotipuzukajida.pdfIn PDF document text
    • https://f511fae9-839b-4dc4-b9fe-2e6f1305d388.filesusr.com/ugd/c4dbd3_6fe26b5b30fe4cd99eb8ed8b939f44a3.pdf?index=trueIn PDF document text
    • https://22e365c6-0853-42e1-82f8-83473bf9c0bf.filesusr.com/ugd/217d68_6e907d8af2dd4592b2e37ea5277076f7.pdf?index=trueIn PDF document text
    • https://80b2a579-f9ed-4aa0-b91a-ac3c8973c086.filesusr.com/ugd/353d00_3a92c8ea0c26443cbdf036619b6a169d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fosagoba/88134086798.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/sad_love_shayari_video.pdfIn PDF document text
    • https://5efcf519-4c71-4be9-a00f-e1d47ba804c5.filesusr.com/ugd/ebcc4b_6975f0387d274dde83b417345510d08f.pdf?index=trueIn PDF document text
    • https://6ba7316d-b84b-4ccb-a32a-103c856d4013.filesusr.com/ugd/91f37e_76dfc93e114646faa1fa1be6c989dea2.pdf?index=trueIn PDF document text
    • https://28932ed2-21d9-4123-99cb-fcff0aac4472.filesusr.com/ugd/cc089a_6eb00e4d39a3430f96ed5a32ce33748e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/fokapu.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_off0000eca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA9 5220 bytes
SHA-256: c9dd9224e908bc96b00e0ce4d5bd17445e2ed537f01045b76bab1050f1df44cc
font_01_sfnt_off0000fe8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8A 10992 bytes
SHA-256: 3625a7a3bc906984805d975e9807f6b763d7e9e000e0fd6696507194fa6c9173

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