Malicious PDF — malware analysis report

Static analysis result for SHA-256 83ba8de04a83de8a…

MALICIOUS

PDF

76.0 KB Created: 2021-03-21 00:05:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 058286c01dc92526d2de40fd4c9c5f1d SHA-1: 7aa31b5e8b59a21ba5b8727636f028d7104868f8 SHA-256: 83ba8de04a83de8aafe85c3bc73b377ee4d42b0cd79aa3c806d3be01800f035e
156 Risk Score

Malware Insights

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

The sample was identified as malicious by ClamAV and an ML classifier, with critical heuristics indicating it functions as a PDF link farm. It contains numerous embedded URLs, many of which are unknown or lead to potentially malicious content, suggesting an attempt to redirect users to harmful sites. While no scripts were directly extracted, the PDF structure and heuristic firings strongly suggest it's designed to exploit users through malicious links.

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
  • 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 http://fozakewugumomig.22web.org/zadopunozomixamumarexe.pdf In PDF document text
    • http://fiwetud.scienceontheweb.net/49502736369.pdfIn PDF document text
    • http://freehookup.xyz/17791699784r38f3.pdfIn PDF document text
    • http://luminar2-download.xyz/275618374609x2wy.pdfIn PDF document text
    • http://zugobopepoj.sportsontheweb.net/imperatives_exercises_worksheets.pdfIn PDF document text
    • http://yoga-italy.space/elizabeth_browning_how_do_i_love_thee_poem7pfpa.pdfIn PDF document text
    • http://opensalon.xyz/ditajimonolzfcq.pdfIn PDF document text
    • http://pedumerik.sportsontheweb.net/mitsubishi_mr_slim_inverter_operation_light_blinking.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/WboozbXZlIE/wb?keyword=no%20game%20no%20life%20novel%2011PDF link annotation
    • https://e824aeac-d22a-4b45-bb3c-17051d6ee04f.filesusr.com/ugd/de60da_15a4d96e76e34607992fa956e1f0a9f9.pdf?index=trueIn PDF document text
    • http://jikelaxapexa.onlinewebshop.net/buku_hak_asasi_manusia.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/arteries_of_the_arm_and_shoulder_answers.pdfIn PDF document text
    • http://famutiparuzot.epizy.com/how_to_make_a_backwash_filter.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/birthday_celebration_kannada_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/27826385495.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/blade_and_soul_revolution_english_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/33518668734.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/black_and_decker_electromate_400_jumper_cables.pdfIn PDF document text
    • https://e61e9f85-32c5-4861-9fd4-b89109084c35.filesusr.com/ugd/2e4eb4_015d6f55ec45453faa3948bec28a01a6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/mixovogokivane.pdfIn PDF document text
    • http://likutolejit.onlinewebshop.net/uke_chord_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/biohazard_4_game_for_android.pdfIn PDF document text
    • https://d52aed46-be45-4f9b-8106-cf6fc7ee66c0.filesusr.com/ugd/b148e5_74acc795c43f473a82c6af6129fb917b.pdf?index=trueIn 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_off0000ee97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE97 4892 bytes
SHA-256: 0692f092e86b9d88e97ab337dd16ca4325799e1aae77cfd7555631278fc51d3b
font_01_sfnt_off0000ff4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4D 10484 bytes
SHA-256: 9a0a61407335abf3f6f4fc735ccbd4c38cdac9c667062a0c982f69af7b523a1a

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