Malicious PDF — malware analysis report

Static analysis result for SHA-256 db44bd5f2c32d8e2…

MALICIOUS

PDF

73.6 KB Created: 2021-04-18 10:32:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 63f4dffd6f7f3caa9e2bdc8c4dde60a1 SHA-1: 24665d2e813f26ebe5db7d7642dd30c4ec9a836a SHA-256: db44bd5f2c32d8e2e6c6f1d8e4be74368ddcb58993bda05819707d17745363c6
126 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan delivery mechanism. It contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain that appears to be part of a link farm designed to redirect users. The document's content, though heavily obfuscated, suggests it is intended to deceive users into clicking malicious links, likely for credential harvesting or further malware deployment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://lozipotod.ru/strik?utm_term=cuantos+pies+tablares+tiene+un+metro+cuadrado PDF link annotation
    • https://cdn.sqhk.co/jesotipo/6MgiCuR/85902077711.pdfIn PDF document text
    • http://pixunune.sportsontheweb.net/vudupogiludodozaba.pdfIn PDF document text
    • http://risimog.mywebcommunity.org/aprender_ingles_y_audio.pdfIn PDF document text
    • https://cdn.sqhk.co/zolilobup/RgdK4Np/the_walking_dead_road_to_survival_cheats_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/rezeribevi/ejiHgj1/zewet.pdfIn PDF document text
    • http://vigastlens.xyz/the_brothers_karamazov_movie_free8hqvg.pdfIn PDF document text
    • https://cdn.sqhk.co/bogonelemid/gyjcEje/enerpac_porta_power_pump.pdfIn PDF document text
    • http://slmit.fun/51029559775ucfmi.pdfIn PDF document text
    • http://nidewopovuwubo.mypressonline.com/24822726545.pdfIn PDF document text
    • https://cdn.sqhk.co/gadewekunel/iaQ9jdE/red_velvet_swordtails_for_sale.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/a33886b8-b704-4510-87d9-2e08c5634e3a/which_breed_of_dog_is_easier_to_train.pdfIn PDF document text
    • http://tuminexozuvino.atwebpages.com/20516544725.pdfIn PDF document text
    • https://f0198b83-f3fe-41b4-8315-bacd7eabb238.filesusr.com/ugd/2b3f46_747d6397ec9d476ba1ab3681a16f9e14.pdf?index=trueIn PDF document text
    • https://a22c3535-4c29-4f26-bf6b-1e631d3648e5.filesusr.com/ugd/28986c_345255c3a82040baa5f0e688b8f4c419.pdf?index=trueIn PDF document text
    • http://pizitibasowu.atwebpages.com/sojowaguvulaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90bbaebc-9b21-47dd-92e5-b15e917881bc/the_easy_way_to_stop_smoking_book_reviews.pdfIn PDF document text
    • https://a49a6154-edc8-4132-95a2-c7bb8d673fe9.filesusr.com/ugd/551169_f432ee1606d9452da28f8d8189303db5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea840373-12dc-473f-ab81-fe92d79f69bd/harry_potter_y_la_orden_del_fenix_audiolibro_latino.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_off0000e169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE169 5264 bytes
SHA-256: 376119efceab67c38a7df0e197706162141f957fa6886f546097ed4a6a60a08b
font_01_sfnt_off0000f32a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF32A 11540 bytes
SHA-256: 9d9983d05fc3636b07e951c6ed7aa9ffa47abe88104a3806d52da8391328870d

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