Malicious PDF — malware analysis report

Static analysis result for SHA-256 983099122e776eb3…

MALICIOUS

PDF

84.2 KB Created: 2021-04-04 15:47:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e49c36439cd8fc5da4f1c5b6180c31a6 SHA-1: 100f41c5bd70d02e3623265ece88be61ad7c770e SHA-256: 983099122e776eb30844fbe98a45254e6581821eac065e137fc433b4e4f09da8
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a primary focus on directing users to a suspicious domain for what appears to be a phishing or scam attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a large number of links on disposable hosting, further supporting the malicious intent. ClamAV detection as 'Pdf.Phishing.Trojan' confirms the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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://xezojetit.ru/award?keyword=business+report+writing+example+pdf+for+students PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426090/normal_60445ab97c951.pdfIn PDF document text
    • http://kabomodom.iblogger.org/biwomi.pdfIn PDF document text
    • http://micrometer25bill.site/sobebtbinx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457854/normal_5fc75d4358b6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369632/normal_6044931ee54e1.pdfIn PDF document text
    • http://fozobojik.iblogger.org/gojubulinigiwuja.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • http://sigonalen.22web.org/enhancement_mosfet_datasheet.pdfIn PDF document text
    • http://degadeg.22web.org/graduation_money_thank_you_card_template.pdfIn PDF document text
    • http://bio-ita.fun/medical_laboratory_scientist_resume_templatexc3vk.pdfIn PDF document text
    • http://nakanilo.club/how_to_turn_up_volume_on_bose_sounddock_10_without_remoteyzd0p.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://5b0e1d79-1acc-45ba-a965-31015372eee8.filesusr.com/ugd/67f5f7_3533c38709c74d16a93bd3e27ae15cf1.pdf?index=trueIn PDF document text
    • https://357b8bef-7330-4cfe-b31d-389db25c4d5a.filesusr.com/ugd/4c76bf_9a55089f24cc47afa9f9e6d7d0bb5962.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecb801d6-d024-480d-8e93-4c39b2c5383d/the_hunger_games_books_vs_movies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffc60383-2509-448a-9cc8-cd46da59538e/telumigosal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52497dc2-6896-4947-8e8a-ad18af5349af/mamojasokuwajavenir.pdfIn PDF document text
    • http://fusugesagovovez.rf.gd/fender_hot_rod_deluxe_tweed_cabinet.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/96558772655.pdfIn PDF document text
    • https://58f604bd-1fd8-4cfe-af9b-f15e67d030d5.filesusr.com/ugd/9a7439_01e909cd4c2a4e9fa7b9e947af85943f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e63ad420-e8d4-4705-8ca7-037f51fac5c6/how_to_sort_by_descending_order_in_word.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/62664673605.pdfIn PDF document text
    • https://ee60c613-3dd1-430d-b711-08e3dcbf0273.filesusr.com/ugd/19ce5d_43f0df5a8b0640b29f120f3a3c7c2bdb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/aae0fefb-6e06-4a87-9864-d08f7539aca6/rafefukowezuxon.pdfIn PDF document text
    • https://550dfcec-0280-4316-a0d5-68b74a7a20b9.filesusr.com/ugd/f59309_09abf60833f24dd79ca2a4a53d8d5169.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/95884940732.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB46 5452 bytes
SHA-256: e165709c873606deacebfdeff7094a1229f694efbcf6f80bf77c545a14c1a453
font_01_sfnt_off00010dc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC7 11416 bytes
SHA-256: ced198b9a4d064ec4d671117361b335c99c3da999cccc5b0069bc032392dc21a
font_02_sfnt_off0001348e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1348E 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c