Malicious PDF — malware analysis report

Static analysis result for SHA-256 4465dc778ac8d576…

MALICIOUS

PDF

82.3 KB Created: 2021-04-19 11:36:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0579961be895f617b9f73ecaebaf621 SHA-1: 38833e28f6f1687567c883679d6a3caabca63016 SHA-256: 4465dc778ac8d57690d5530c66e323370ca2a07c9463738f722bb06b0a4f2d37
96 Risk Score

Malware Insights

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

The PDF contains a heuristic indicating a large number of external links, suggesting a link farm or SEO abuse. The document body, though heavily obfuscated, mentions "How to repair beats solo 2 ear pads", which appears to be a lure to drive traffic to malicious URLs. The presence of embedded URLs and the ML classifier's high confidence score support the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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://pelibifir.ru/strik?utm_term=how+to+repair+beats+solo+2+ear+pads
    • http://naturaleone.space/garmin_approach_s62_waterproofkjo6w.pdf
    • http://gufutaca1.xyz/5261521636xi8xo.pdf
    • https://guxenakab.weebly.com/uploads/1/3/5/3/135393472/fajikefosab.pdf
    • http://digitaltoolsfor.xyz/chemistry_1_ionic_bonding_practice_problems_worksheet_answersggz26.pdf
    • http://dfahsdfgjsfg.online/9935065393gdr6h.pdf
    • https://gejizataki.weebly.com/uploads/1/3/3/9/133997606/ligav.pdf
    • http://1xbet-football.fun/reliability_of_post_mortem_report0fcdl.pdf
    • http://rixugogalide.22web.org/sojadilugogixalop.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rizijubovapuk/livepipukupibak.pdf
    • https://uploads.strikinglycdn.com/files/3869f0b7-8862-436e-97a1-284dd1d4fec9/bokipaxojal.pdf
    • https://s3.amazonaws.com/sizadagazagaj/forma_para_chocolate_video_game.pdf
    • https://s3.amazonaws.com/xalexojaxipud/canon_lide_110_scanner_software.pdf
    • http://kuzoxutinilidog.rf.gd/76020236453.pdf
    • https://s3.amazonaws.com/xalexojaxipud/60229925084.pdf
    • https://uploads.strikinglycdn.com/files/8c3dc21c-6e3e-462f-ae81-ea53fd589fa8/40300033399.pdf
    • https://s3.amazonaws.com/sajatofubote/free_compare_and_contrast_essay_examples.pdf
    • http://jujalun.rf.gd/tazevumole.pdf
    • https://s3.amazonaws.com/bopuxosavubare/fatanukirenodan.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1f9.bin
df91dabf0babda90ed4b11ad0f19728e13c28fae4ff940c0ea5b698da86f6d97		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F9 5276 bytes
font_01_sfnt_off0000f3f2.bin
1069683a7005f795876a59f23e09ddf8ae3944727b1c309112c4b81e89745742		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F2 2212 bytes
font_02_sfnt_off0000fe05.bin
a82317854205b4235096c2ab6de22352fb512e1d14cb1504d8b0f5ac40631fc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE05 11416 bytes
font_03_sfnt_off00012518.bin
aad9bc0f36eadc3314e08670b59090120051e308b357201f134af3d0b781b2b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12518 16312 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.