Malicious PDF — malware analysis report

Static analysis result for SHA-256 75374fa549435452…

MALICIOUS

PDF

81.5 KB Created: 2021-03-25 08:13:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7ef416fd4707dbd23e8ef05383921a9 SHA-1: d7bc5889d1762067084fb032251dce69c1271932 SHA-256: 75374fa549435452e2dc5433335c044da5641d7f000871a0d6151bbaa004c6e7
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' suggests the document contains numerous external links, with 'https://bologen.ru/wix?keyword=big+jet+plane+lyrics+tuka' being a prominent example. This pattern is often used for SEO poisoning or to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bologen.ru/wix?keyword=big+jet+plane+lyrics+tuka
    • https://lafawifovetin.weebly.com/uploads/1/3/4/3/134369932/4680678.pdf
    • https://womogidukiwu.weebly.com/uploads/1/3/4/8/134873304/9632421.pdf
    • https://ganizosu.weebly.com/uploads/1/3/4/4/134434359/paragipaba_bojupim_dexojusum.pdf
    • https://zidovularirijap.weebly.com/uploads/1/3/4/7/134718784/2a519bffa09.pdf
    • http://lapitubemexidi.mywebcommunity.org/war_of_the_worlds_full_movie_free_download_tamil_dubbed.pdf
    • http://xatovapotogu.mywebcommunity.org/23195798340.pdf
    • https://fepobiwebefu.weebly.com/uploads/1/3/4/5/134592484/7475461.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/xonaxevetaf/13458525284.pdf
    • https://uploads.strikinglycdn.com/files/05b5c2f3-2e45-4152-9ca9-b3cf302d5677/resam.pdf
    • http://sebokegekesuded.atwebpages.com/wolefef.pdf
    • https://uploads.strikinglycdn.com/files/75b0476f-3ac9-43bd-a098-e75c9941ad19/how_to_write_a_short_essay_250_words.pdf
    • https://s3.amazonaws.com/sumesawoxajew/bidadari_tak_bersayap_gratis.pdf
    • https://uploads.strikinglycdn.com/files/dd35bf8a-0b68-4e98-9c96-469de366709d/nejitagomodugodirapaxefi.pdf
    • https://s3.amazonaws.com/sixenogafopoj/53328088397.pdf
    • https://uploads.strikinglycdn.com/files/848667f3-c6f6-471b-8845-7aa216bf2d3b/xizutipetidome.pdf
    • https://uploads.strikinglycdn.com/files/21dbf1b1-85ec-40fd-a6e0-5123e79c78ab/how_to_string_a_barnett_vortex_bow.pdf
    • https://uploads.strikinglycdn.com/files/53d62e68-8986-452e-b94c-caf5aae3f3e8/gofefofiwamipafufufomu.pdf
    • https://s3.amazonaws.com/mejados/google_spreadsheet_script_find_value_in_range.pdf
    • https://s3.amazonaws.com/farowug/global_gender_gap_report_gktoday.pdf
    • https://uploads.strikinglycdn.com/files/0542ca51-18ab-4e87-a364-f19f4c5e295f/aa_fourth_step_worksheet.pdf
    • https://s3.amazonaws.com/kokesatodixon/love_yourself_meaning_yahoo_answers.pdf
    • http://kavuduvolilazod.myartsonline.com/99785091722.pdf
    • https://uploads.strikinglycdn.com/files/2b459df2-cde2-4094-b826-a5d0411ca839/91542376476.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f35d.bin
00caa500206f4451a6995dc6b53ad14009b0945975dd5eaf613ca50296cb86d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF35D 5164 bytes
font_01_sfnt_off00010509.bin
1dd49bf0e22778f73a233bb7793222f00fea6653c203ffe2c6a79aec5678d863		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10509 11004 bytes
font_02_sfnt_off00012aa8.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12AA8 4324 bytes

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