Malicious PDF — malware analysis report

Static analysis result for SHA-256 73ec36dea080795c…

MALICIOUS

PDF

74.9 KB Created: 2021-03-16 01:18:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 2ac76ae5541e4af244ca34e7e325b324 SHA-1: be9c0606eda8b8ad3f93677638d03137cbded6a5 SHA-256: 73ec36dea080795cdf3117e20fb1aba426f511d9b2918fc2f1aeb9252182b8cc
146 Risk Score

Malware Insights

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

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains multiple embedded URLs, one of which is presented as a search portal for 'terrebonne parish warrants', suggesting a phishing or scam lure. The heuristic 'SE_CALLBACK_LURE' further supports a phishing or tech-support scam context. No scripts were extracted, but the PDF structure and embedded URIs indicate a malicious intent to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://golowaki.ru/wix?keyword=terrebonne+parish+warrants+zuercher+portal PDF link annotation
    • https://cdn.sqhk.co/piwuzuberaze/ghtiicJ/cat_screen_licks_video_lwpl.pdfIn PDF document text
    • https://cdn.sqhk.co/jetirivotu/I1ibhTx/83529743819.pdfIn PDF document text
    • https://cdn.sqhk.co/pasivuzuke/gnifhb4/nhl_hockey_live_streaming_free.pdfIn PDF document text
    • http://blacklaser.ru/safety_1st_alpha_omega_elite_sophomore_car_seat_manuala4pa3.pdfIn PDF document text
    • http://delaem-sami.online/bachelor_degree_in_information_technology_south_africab51jl.pdfIn PDF document text
    • https://cdn.sqhk.co/numavagoko/jgijii4/zopaxipuwetubibigid.pdfIn PDF document text
    • https://cdn.sqhk.co/sativomofij/dighwqo/96878384159.pdfIn PDF document text
    • http://tigafik.mygamesonline.org/windows_server_2012_r2_datacenter_vs_standard.pdfIn PDF document text
    • https://cdn.sqhk.co/bunigenozav/HJYhagg/33446590579.pdfIn PDF document text
    • http://salejozokaboruz.22web.org/96427484228.pdfIn PDF document text
    • http://loveantravel.xyz/ketorolaco_formas_de_presentacion1xmub.pdfIn PDF document text
    • http://ligufotenoradod.iblogger.org/61543464059.pdfIn PDF document text
    • https://cdn.sqhk.co/defisepeniba/gv3gigd/private_tunnel_vpn_crack_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/xubupigegi/jePjfJQ/free_wifi_at_home_2020.pdfIn PDF document text
    • http://digtalcaliper09.xyz/google_translate_app_for_desktopw736e.pdfIn PDF document text
    • http://zugemenelil.medianewsonline.com/patterns_of_world_history_brief_third_edition.pdfIn PDF document text
    • http://getallcreditscores.info/mesifilekivedemavafimiigujx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb3d39f4-5f2b-4bbd-9940-7a285eed5b92/26310250373.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5700b397-52a4-47aa-950b-0aa7f4c94446/wodase.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92375d8d-9d18-4006-80cb-4da3c06456c2/tabitibopaxonufebalu.pdfIn PDF document text
    • http://xafibejijopo.atwebpages.com/sakamoraguliwunumimogi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4cc1d4a-6f35-4581-990a-e796df239d37/visual_basic_2019_reference_guide.pdfIn PDF document text
    • http://pexevogawi.epizy.com/pebepune.pdfIn PDF document text
    • http://zuputes.atwebpages.com/mixonazasinidibefe.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4EF 5252 bytes
SHA-256: 502689f35f0ddb69276d209ec69656780dc8bbb830e40dd8ad95da34872d34cb
font_01_sfnt_off0000f6d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D9 11508 bytes
SHA-256: 980595f5ce2a6f31381f8e0483aa0eeeb7d7a97097eb33d9259747660653e0e5