Malicious PDF — malware analysis report

Static analysis result for SHA-256 750d4a3595337bef…

MALICIOUS

PDF

76.8 KB Created: 2021-03-28 05:02:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: ceab588d1673cfbc3a1ee7c382c8fb96 SHA-1: 50e86b3c8370a3a64061d8fb9db942a5cf6968f4 SHA-256: 750d4a3595337bef8589f3cd153fe3c822ee020716e233389d0abd84de7f8f04
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing or trojan. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a title about making a Harry Potter wand. The embedded URLs and heuristic firings indicate the PDF functions as a link farm, redirecting users to various external sites, some of which are hosted on disposable domains and are associated with spam or potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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://jottigo.ru/strik?utm_term=how+to+make+a+diy+harry+potter+wand+without+hot+glue PDF link annotation
    • http://50offit.pro/how_to_reset_a_midland_weather_radio2rg4i.pdfIn PDF document text
    • http://pasetbs.xyz/how_to_charge_stanley_portable_power_station8td3l.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452169/normal_5fc5819cbf007.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456119/normal_5fca98e1e1ede.pdfIn PDF document text
    • http://waranijovuv.sportsontheweb.net/antimicrobial_activity_of_medicinal_plants.pdfIn PDF document text
    • http://zumepaposakuf.scienceontheweb.net/ortodoncia_y_ortopedia_maxilar.pdfIn PDF document text
    • http://serururepus.scienceontheweb.net/modal_verbs_exercises_advanced.pdfIn PDF document text
    • https://cdn.sqhk.co/zobelekivix/cgcnpgc/missing_megan_trailer.pdfIn PDF document text
    • http://ligexekena.mywebcommunity.org/free_trade_vs_protectionism_advantages_and_disadvantages.pdfIn PDF document text
    • http://felesatediz.medianewsonline.com/69772254969.pdfIn PDF document text
    • http://copyright-rules-help.com/romeo_juliet_movie_songs_download_in_kuttyweb33vsg.pdfIn PDF document text
    • http://copyright-help-center.com/manitoba_election_2019_party_platformsx922q.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418368/normal_60564318daf13.pdfIn PDF document text
    • https://cdn.sqhk.co/suwezuzifu/dlhdgic/front_license_plate_in_california.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450242/normal_60401f961e97b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4465b75e-e642-4f53-8c89-e22f0b9d4994.filesusr.com/ugd/ecd213_ca7b8ff5de2f44b1a4b4242d283f8fdc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7f4a0b0-02bb-4fb4-a3bc-23ede803fdb4/51561242355.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42f4675e-27f6-448a-96a8-382bd475b212/44011655902.pdfIn PDF document text
    • https://24218389-b518-4ca3-8548-65eaf758daa4.filesusr.com/ugd/c836c3_1cc84b4fc867468381c621cc751236af.pdf?index=trueIn PDF document text
    • https://8569cc17-8b2a-4187-ace0-95b0550b99f0.filesusr.com/ugd/d6eede_9c3d8be9e1294e23b994b85ba03493d7.pdf?index=trueIn PDF document text
    • https://31c8a3d4-0132-49f1-a04f-09c79d03e01f.filesusr.com/ugd/a4da84_cb149c31dbf24ccab7868c85d291c711.pdf?index=trueIn PDF document text
    • https://26aaa629-0581-4e25-ae32-a194504e59ab.filesusr.com/ugd/2d4e87_d7111768ca3f4c409b59b1be7a379d18.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dba198d-d776-4328-a3ab-6febe1ee6be8/gagivojumuxuxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e62fe84-39d3-4041-98f1-0010bd251353/66132833056.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_off0000eccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECCB 5412 bytes
SHA-256: eceac56c8cbbdcd9328dce3474ae8da431e0ce79226bc3a90ab6a023a7ea98b1
font_01_sfnt_off0000ff1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1D 11072 bytes
SHA-256: 1fff4d3751b0a52a4fb0c190125e8cdedc0e6a6ab8c5665d463d32c20c74729e