Malicious PDF — malware analysis report

Static analysis result for SHA-256 722e99f388fc0926…

MALICIOUS

PDF

73.8 KB Created: 2021-04-14 15:13:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 900a7454c4eecf6345ed5c6d95553ee3 SHA-1: 1bcc5cda6ce128111e5d99d94445bf63bd5decf1 SHA-256: 722e99f388fc09263ae615ec57798be9156811c46848296244961199b3bc84e2
216 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. It uses brand-impersonation credential phishing. 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 0.9999

Heuristics 6

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://xoxajunun.weebly.com/uploads/1/3/4/3/134351876/pomasa.pdf.
  • 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://baarspo.ru/strik?utm_term=antigone+unit+test+study+guide+answers PDF link annotation
    • https://xoxajunun.weebly.com/uploads/1/3/4/3/134351876/pomasa.pdfIn PDF document text
    • https://zamovolipizutuj.weebly.com/uploads/1/3/1/0/131070940/wanekiw.pdfIn PDF document text
    • http://xulazawelinuze.scienceontheweb.net/57869265406.pdfIn PDF document text
    • https://subafeso.weebly.com/uploads/1/3/3/9/133986831/9255773.pdfIn PDF document text
    • http://vadosixajobirug.mygamesonline.org/binomial_theorem_class_11_notes.pdfIn PDF document text
    • https://zibizunazop.weebly.com/uploads/1/3/2/7/132710786/78f42016a0541b4.pdfIn PDF document text
    • https://rigopijifotifat.weebly.com/uploads/1/3/2/6/132695828/8013eaef987d621.pdfIn PDF document text
    • https://pivazadigemeza.weebly.com/uploads/1/3/4/6/134642233/xotowelamusowojafapo.pdfIn PDF document text
    • https://valabonef.weebly.com/uploads/1/3/1/3/131379230/8916326.pdfIn PDF document text
    • https://fegafedanopi.weebly.com/uploads/1/3/4/3/134311678/renitov_fovekili_vatamefadit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/logistics_and_supply_chain_management_ppt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f2c6938-602f-4be2-80e7-33b7bc3ec35c/79134866917.pdfIn PDF document text
    • https://s3.amazonaws.com/daxemo/jakudugevi.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/bot_auto_liker_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/skyrim_special_edition_mod_load_order_xbox_one.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/9734305060.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cec97f44-6eb3-420d-9727-66baf9bd97c5/gaggia_classic_coffee_machine_instructions.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_off0000e055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE055 5144 bytes
SHA-256: 7d0303170a94ca22b61657151e90bdf64e2d62dba299644e29050d9d0e52ee90
font_01_sfnt_off0000f202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF202 11592 bytes
SHA-256: 57d747186dc91d64229acda9f62d7126e3ae086d125258fb2b94b957674d1c5d

Open this report in the interactive analyzer, or submit your own file for analysis.