Malicious PDF — malware analysis report

Static analysis result for SHA-256 727cc6439d0b09b8…

MALICIOUS

PDF

121.4 KB Created: 2021-03-27 20:25:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 66ff370fcc4fe63a228749bd9a5024df SHA-1: edde5f914ce360a0c547237bffcb15139946977b SHA-256: 727cc6439d0b09b8b7257f4c600faff985c7404dfc60f3098853915b4b5ee486
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and identified as part of a link farm, strongly suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection confirm the malicious nature of the file. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, likely to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xezojetit.ru/wix?keyword=supernatural+time+travel+fic+recs PDF link annotation
    • https://cdn.sqhk.co/mowezeto/evDMjnr/delphi_dragalia_lost_gamepress.pdfIn PDF document text
    • http://repochka.site/where_is_the_defrost_timer_on_a_frigidaire_side_by_side_refrigerator8dye4.pdfIn PDF document text
    • http://nout-sale.site/juponitefiviltly6q.pdfIn PDF document text
    • http://fuxuxixigu.scienceontheweb.net/alimentazione_ayurvedica.pdfIn PDF document text
    • https://cdn.sqhk.co/kototokim/bEijtT3/zadafukinuz.pdfIn PDF document text
    • https://cdn.sqhk.co/sifajoxojif/HjiidNC/6690189532.pdfIn PDF document text
    • https://cdn.sqhk.co/dijogiper/oihvOgh/instachat_messenger_alphabet.pdfIn PDF document text
    • https://cdn.sqhk.co/libobivole/7hbijPW/mantis_pinball_protectors.pdfIn PDF document text
    • https://cdn.sqhk.co/nejajevafode/Gtnjaid/xeralokononuxurawixu.pdfIn PDF document text
    • http://zipafaxelati.sportsontheweb.net/jakajexarudurujumuzem.pdfIn PDF document text
    • https://cdn.sqhk.co/wixikinotu/aLhjbua/red_alert_2_windows_10_steam.pdfIn PDF document text
    • http://microbladingeyebrowsdallastx.com/vault_dwellers_official_cookbooky6zkz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/5549d2d3-433a-4172-84bc-1b75c45ea60f/a_dolls_house_2_script.pdfIn PDF document text
    • http://baxewape.myartsonline.com/19982417174.pdfIn PDF document text
    • http://ropupifalapoges.atwebpages.com/g-shock_mudman_atomic_solar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4335ef35-09fe-4828-8bcc-a024342c23e8/cos_180_degrees.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b71ce0b-d637-4b27-a73f-1e90e2187555/bojopilakatepadu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fa495b1-77bd-4e3f-bdaa-ab270a516428/mubovoba.pdfIn PDF document text
    • http://zagofij.onlinewebshop.net/26874733441.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17770 5096 bytes
SHA-256: efdb035da6271e4d519e0fbbe58554f1c5aef73f06c80ea85a46daaab59bf989
font_01_sfnt_off000188aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x188AA 12116 bytes
SHA-256: 83a96559a3daefcf218defbc9d2b1a5674240251d4d6684d72b167215b952cc5
font_02_sfnt_off0001b240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B240 16460 bytes
SHA-256: a46c975b5ef5d519b15a7c4b5b8f32827da538f2864743aa95542af1efc0c799
font_03_sfnt_off0001c810.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C810 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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