Malicious PDF — malware analysis report

Static analysis result for SHA-256 db22528806bb379e…

MALICIOUS

PDF

58.7 KB Created: 2020-12-16 06:06:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c215aea6bc377917bfb899f6a0ff5609 SHA-1: d7b077700a0f73e7e1f0a601e955de0797f5a487 SHA-256: db22528806bb379ed85e5b61416b7458e68ffee2779255388db5e1d03ca58a33
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting a coordinated effort to distribute content or redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/123?utm_term=bullet+time+fighting+unblocked In PDF document text
    • https://pasosawa.weebly.com/uploads/1/3/4/7/134737133/xujawe.pdfIn PDF document text
    • https://bupefozatige.weebly.com/uploads/1/3/4/3/134384552/3260920.pdfIn PDF document text
    • https://kironipopobak.weebly.com/uploads/1/3/4/3/134308812/7191014.pdfIn PDF document text
    • https://mozovarowojexi.weebly.com/uploads/1/3/4/8/134867055/pazegi-vumafedopuvu-bewipisoledigu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc77bb32da0933358947c99/t/5fce42f38a55f2188ba4915f/1607353077006/republic_of_doyle_smash_derby_cast.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1aa40d26ff1194f791695/t/5fca84aa856f585034a45134/1607107755378/27179382566.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c05b032-5c2d-4133-b7b5-be5a67d63e7b/lasitobetodero.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc4cf790-c036-4bdd-bd4b-779add0286cf/8979123017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15827cfd-4bbc-4d09-9ead-333d790942f8/omega_ruins_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54b3f2d0-83b0-47fd-a381-8feba51096a5/dream_league_soccer_2018_hack_mod_apk_cheat_for_unlimited_coins.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5adad64f-eaa3-47a6-a03e-fc6ddb264beb/lewewisaborosipog.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc15a3c60f2895dc1eafeb7/t/5fc768a209f4d56e8f852c9e/1606903970991/46903680448.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc66204c89e1c4b8fe419e2/t/5fce9ddc5b1d5f2ceb691203/1607376349522/tabou_stories_love_episodes_hack_apk.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_off0000ac3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC3E 5204 bytes
SHA-256: 80618577aca37dcd4f06e26786b0514f2c64b530bb8043b93c4416966605c433
font_01_sfnt_off0000bdd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDD4 9552 bytes
SHA-256: ff4dd32ea87df137e7620e8478699bd7a083d0bd65815959cf0b0e59aec97d8a

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