Malicious PDF — malware analysis report

Static analysis result for SHA-256 abe5b4130307f384…

MALICIOUS

PDF

85.3 KB Created: 2021-04-28 11:34:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b1e1531b26311715a83979632e5eadc2 SHA-1: 70022d0b82ebf580bb6d3454483dc1cea173396f SHA-256: abe5b4130307f384a3f11fcd8f8fcf8d56b48981c113451451cb33bbddff1224
186 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 0.9994

Heuristics 6

  • 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 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.
  • 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://leonvi.ru/strik?utm_term=what+makes+theme+parks+special PDF link annotation
    • https://sagupegijugix.weebly.com/uploads/1/3/4/4/134443219/buvobuwevarotobelu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410954/normal_5fc77634dfe16.pdfIn PDF document text
    • http://yesitalia.fun/the_art_of_loving_erich_fromm_analysisj9b0l.pdfIn PDF document text
    • https://niniteju.weebly.com/uploads/1/3/0/8/130814631/4757c5f434fe3.pdfIn PDF document text
    • http://coupons2020.info/nofakigofejelifwxh3.pdfIn PDF document text
    • http://potolkilife.ru/talozoxutosjhj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392463/normal_60135f100e8fa.pdfIn PDF document text
    • https://savuvudibifig.weebly.com/uploads/1/3/4/3/134328071/wekanunidavogivu.pdfIn PDF document text
    • https://zisumujabi.weebly.com/uploads/1/3/5/3/135315444/wixoxodak-nitukolemib.pdfIn PDF document text
    • http://shtangelkipokupkiitd.online/calories_in_a_nacho_bell_grandegbyn0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493545/normal_6014d28753aa3.pdfIn PDF document text
    • https://bovejivisesuja.weebly.com/uploads/1/3/1/3/131384116/kimozuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385204/normal_601bb2d82ce53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366382/normal_6039ad7bc710f.pdfIn PDF document text
    • https://bemijeze.weebly.com/uploads/1/3/5/3/135302335/8782499.pdfIn PDF document text
    • http://form-lnstagramcopyrightservices.com/how_to_fix_hampton_bay_ceiling_fan_lights9nh4.pdfIn PDF document text
    • https://rivepolimuf.weebly.com/uploads/1/3/0/8/130813401/jomalevezap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387825/normal_60438429df210.pdfIn PDF document text
    • https://tubuwixufadone.weebly.com/uploads/1/3/5/3/135315283/wabeditap.pdfIn PDF document text
    • https://vowemiwa.weebly.com/uploads/1/3/5/3/135392560/2175742.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451206/normal_606371055e5bc.pdfIn PDF document text
    • http://thefortykuti.com/piano_sheet_music_fortnite_challengexvnsq.pdfIn PDF document text
    • http://tophomework.space/accounting_information_systems_11th_edition_bodnarfsu10.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00011108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11108 5248 bytes
SHA-256: d0393f41013de42384cfbfe8c30c24c0c9d62b3ea5710033de3be394116845a6
font_01_sfnt_off000122c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122C1 10972 bytes
SHA-256: 5e52a9fd1b4cf7024f44ba4cabab11b45262b738995907163d277dc844553216

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