Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8430939aa6a63c0…

MALICIOUS

PDF

78.7 KB Created: 2021-03-25 04:00:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d59f32fd30a7b5b60560b1dc8a5177a6 SHA-1: db2bc392ef153e6a38841b522d443e1c75be6d36 SHA-256: d8430939aa6a63c0de3f779d1c9d5b45646e094a9459d7375e7cc02d797439c3
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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.
  • 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://ponafet.ru/wix?keyword=mastering+the+trade+third+edition+pdf PDF link annotation
    • https://pafukonogoxaxe.weebly.com/uploads/1/3/1/4/131437157/4620286.pdfIn PDF document text
    • http://mirijesuwakug.sportsontheweb.net/21696182026.pdfIn PDF document text
    • https://zepigebilotexo.weebly.com/uploads/1/3/0/7/130739401/zuvuzus.pdfIn PDF document text
    • https://pobikutilun.weebly.com/uploads/1/3/4/8/134871216/wular.pdfIn PDF document text
    • http://nemagufi.mywebcommunity.org/mulutezoferawagumiz.pdfIn PDF document text
    • https://kafekejanabex.weebly.com/uploads/1/3/2/7/132740445/vibiwoxezekew_wuxofamubuw.pdfIn PDF document text
    • https://kabuxezalexafa.weebly.com/uploads/1/3/0/8/130814122/6691811.pdfIn PDF document text
    • http://mokaxizekebade.scienceontheweb.net/2012_dodge_durango_crew_transmission_fluid.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://s3.amazonaws.com/wupixufekijax/6112092804.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2763c3e-150f-4a3a-9e73-0dc4e31bc018/25003583801.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/bluetooth_windows_7_microsoft.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/archdale_vertical_milling_machine_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/anti_stress_unlocked_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/stone_coated_roofing_sheets_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/39321972074.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25fd4db3-a06c-403b-9ddf-30725dea18fc/dugokesabefi.pdfIn PDF document text
    • http://kapowuxivi.atwebpages.com/anderson_bridge_experiment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/730e2553-559d-42ed-a3c7-7612cca72f64/vexilo.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/zunarero.pdfIn PDF document text
    • http://ropupifalapoges.atwebpages.com/biriwimuzugesigozapozujux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01c9b5a5-cb26-4f49-85a3-4bfe535c716e/what_is_wrong_with_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/makixibawumebol/brene_brown_quotes_rising_strong.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B0 5064 bytes
SHA-256: b6651d891a257b48696d4cc9318c775a50613dd50dc145ae7f74102b82f799d0
font_01_sfnt_off0000f7e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E0 11004 bytes
SHA-256: 670be75881bd0c493c83d5959c36062060d7b5e2b620f3b86095a137cb76f102
font_02_sfnt_off00011d5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D5E 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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