Malicious PDF — malware analysis report

Static analysis result for SHA-256 a89d8e8ee7e4e9b6…

MALICIOUS

PDF

78.7 KB Created: 2021-05-03 17:41:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 9758c1bec9e29fb0a1c193a929bf342a SHA-1: 88d8b01ea025105ad4d4ad25d3089c415714ff64 SHA-256: a89d8e8ee7e4e9b6c1c943ed021eefc65c6e4cdfbb5c1ab96177957cb42cf843
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics indicate it functions as a link farm, with numerous external URLs embedded within the document, including a suspicious URL on 'gimoguvi.ru'. The document body, though heavily obfuscated, appears to be a lure related to 'low carb recipes', suggesting a phishing or SEO manipulation tactic. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • 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://gimoguvi.ru/strik?utm_term=what+are+some+low+carb+recipes PDF link annotation
    • http://alkim.xyz/mumovaralaze6hiht.pdfIn PDF document text
    • https://cdn.sqhk.co/dumotometapo/jfAhdgj/lanunofoxogosavurabiju.pdfIn PDF document text
    • https://cdn.sqhk.co/lexaxemiji/c0Pqjjk/american_women_s_basketball_tournament.pdfIn PDF document text
    • https://cdn.sqhk.co/nesixepo/CeS9gdQ/iu_kpop_album_offline_music_download.pdfIn PDF document text
    • http://pro-komp-master.website/2852880448domkl.pdfIn PDF document text
    • https://cdn.sqhk.co/goluxewimabu/EjfggZr/best_craft_beer_delivery_app.pdfIn PDF document text
    • http://voirly.xyz/rixizebanaziximalusen5lv6t.pdfIn PDF document text
    • http://organic-ita.space/scantronic_9600_installation_manual09tox.pdfIn PDF document text
    • https://cdn.sqhk.co/jetuzama/giihiiV/jegunipitowelakemela.pdfIn PDF document text
    • https://cdn.sqhk.co/ributexovek/hetVohj/wifi_password_ip_dns_pro_apk_download.pdfIn PDF document text
    • http://profit-makers.club/56270284227woon1.pdfIn PDF document text
    • https://cdn.sqhk.co/vekasurox/Ej25hbd/ruterisojadijuzituxitemok.pdfIn PDF document text
    • https://cdn.sqhk.co/vapatibu/IidPkJt/gagidogatolulaxuzefavi.pdfIn PDF document text
    • https://cdn.sqhk.co/mizogujuzo/pijgDgi/my_movie_list_2019_malaysia.pdfIn PDF document text
    • https://cdn.sqhk.co/kitobanifamo/Bqiehcz/motorola_g_power_phone.pdfIn PDF document text
    • https://cdn.sqhk.co/xubipoxeguza/7gjNScR/rotunimoposaxuni.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3a0d5408-2ea1-4258-8d29-5d96341cad2c.filesusr.com/ugd/79cb75_ee7c47247a8448e0aedfb58b63983b65.pdf?index=trueIn PDF document text
    • http://gonoluripep.rf.gd/13119097440.pdfIn PDF document text
    • http://bipodolekade.rf.gd/soselilakipuwiwogu.pdfIn PDF document text
    • http://pusitarise.rf.gd/programmable_logic_controller_plc.pdfIn PDF document text
    • http://tujukiji.rf.gd/nupamukizejivim.pdfIn PDF document text
    • https://e4586023-485a-43f1-9451-2d404684c5b7.filesusr.com/ugd/95ff22_3a338bc76e924133a77922355c486057.pdf?index=trueIn PDF document text
    • https://28a90398-13b1-4b58-b54c-ed045a6bddf2.filesusr.com/ugd/7e9e1f_43eabf72b8f34bf4a0c3688b5a8b5eb7.pdf?index=trueIn PDF document text
    • https://ee42ee57-4547-4a8c-8a66-6cccb7f6869d.filesusr.com/ugd/2a9ad2_44bf575b215d4695a3a5e36ab60fe709.pdf?index=trueIn PDF document text
    • https://88966db1-4a83-4446-b941-f65022a6235f.filesusr.com/ugd/928e0f_c97f0e9543344208ab198c3291a23cf4.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_off0000f35d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF35D 5420 bytes
SHA-256: 4bc39d456495d7abaca068611b9b52d01d3061d1038919b210e2308c7a1c20e5
font_01_sfnt_off000105b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B3 11092 bytes
SHA-256: e592e830f79604e33955eb5387915808ab315932af3ea36175a02fd888901b8d