Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e5501b4087b1ec8…

MALICIOUS

PDF

120.7 KB Created: 2021-03-17 20:36:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: ce1272325f3e079a66bfbceca72b829a SHA-1: 41ae354ef824c63b3d4e2360c9f8489c37b2912c SHA-256: 6e5501b4087b1ec8404a7824821d5e0b516c6b933850ecae7e81496160920d1f
216 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, disguised as a biography, which is a common tactic for SEO link farms and phishing. The heuristic 'SE_SECRET_RECOVERY_LURE' indicates that the document may also attempt to trick users into revealing sensitive information. ClamAV detection and ML classification further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://bologen.ru/award?keyword=auguste+rodin+biography+pdf PDF link annotation
    • https://cdn.sqhk.co/kisesawaropo/1gfhgjj/77834172974.pdfIn PDF document text
    • http://aydym.club/lukerosepimetavolmyr63.pdfIn PDF document text
    • http://bigmagazin.xyz/pure_athletic_sports_performancel1nbu.pdfIn PDF document text
    • https://cdn.sqhk.co/jalotenabo/cTgj2ic/kugezatomisij.pdfIn PDF document text
    • http://vas-rem.ru/61059059033welht.pdfIn PDF document text
    • http://usacreditscore.info/soda_stream_reviews_2020_uk8470x.pdfIn PDF document text
    • https://cdn.sqhk.co/foxidagon/gijeEFL/streak_notifications_snapchat.pdfIn PDF document text
    • https://cdn.sqhk.co/dafisuwikib/cggjehe/guvodopira.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/girilifawuxi/btc_private_key_finder_free.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/nirusovebijotifenerujidu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3469bfb-119e-4b5b-a49b-d8e17aa9ef88/62526384070.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/how_to_start_a_nonprofit_organization_for_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c622fc3a-5d57-4937-bad7-1b5db85d5a3d/60087264812.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/734d66a3-23c9-4c7b-a97d-8f507dc913f3/75362997333.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/4mhz_crystal_oscillator.pdfIn PDF document text
    • https://ebcfae26-b4e4-4f1a-a5b2-c5bdbddc1bdf.filesusr.com/ugd/259f90_0a4b33390431490e93ace73110d99272.pdf?index=trueIn PDF document text
    • https://502f924d-676a-41b3-8220-87c01882f600.filesusr.com/ugd/5a20bb_cf5b6161ba4d4b9dbfc96c083f742919.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe09507b-4186-41bd-b183-08293a5a3ff9/fomamugo.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/dokojujiponupejulef.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/checkbox_and_radio_button_in_android.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_off00019627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19627 5504 bytes
SHA-256: 59ef93a75c4f836b3d7a79e69f44cdc665295c8c3c9f40d3ff97b76f6ed01fe1
font_01_sfnt_off0001a8e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A8E5 13708 bytes
SHA-256: 633f21e83f372c2f01fe24c4099d44be4830615ed1f88da0528150fdc37f0716

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