Malicious PDF — malware analysis report

Static analysis result for SHA-256 a34ff5e39f8847e7…

MALICIOUS

PDF

81.9 KB Created: 2021-06-01 04:35:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b5d12c73455fe99516a32712d98bd3f6 SHA-1: af96fb3e568cfb8ad1467892a8d3e1778a1694ac SHA-256: a34ff5e39f8847e77218d215e79ffc4c2e68041d732e192d5ce57137dc901ebf
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 0.9993

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://ponafet.ru/123?utm_term=crosswords+with+friends+answers+8%252F+29%252F+19 PDF link annotation
    • https://nutofagefisamav.weebly.com/uploads/1/3/5/9/135992035/sinidelugefaf.pdfIn PDF document text
    • https://lenagalazipanom.weebly.com/uploads/1/3/5/3/135310064/lisavi.pdfIn PDF document text
    • https://kizegugiruliti.weebly.com/uploads/1/3/4/7/134729255/woniwosenipij_laruvopu.pdfIn PDF document text
    • https://zuwumepegowivos.weebly.com/uploads/1/3/1/0/131069935/407ebbb29f.pdfIn PDF document text
    • https://girodexusaxemo.weebly.com/uploads/1/3/5/3/135388358/a32e6f8.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/8863577.pdfIn PDF document text
    • https://fevebelok.weebly.com/uploads/1/3/4/0/134012800/657ddeca7.pdfIn PDF document text
    • https://wesudami.weebly.com/uploads/1/3/4/8/134881188/f32d8e.pdfIn PDF document text
    • https://rujumimipadud.weebly.com/uploads/1/3/0/8/130874091/432327.pdfIn PDF document text
    • https://kumobavubisu.weebly.com/uploads/1/3/0/7/130775432/pipitiwuletu.pdfIn PDF document text
    • https://gixinizolovuz.weebly.com/uploads/1/3/5/3/135348456/gesononumememu.pdfIn PDF document text
    • https://jagusidenoz.weebly.com/uploads/1/3/4/9/134902343/vetisuxevi.pdfIn PDF document text
    • https://xafuraworeduvux.weebly.com/uploads/1/3/4/7/134752052/3767778.pdfIn PDF document text
    • https://fizinizaboz.weebly.com/uploads/1/3/5/3/135304720/8553689.pdfIn PDF document text
    • https://numuwawi.weebly.com/uploads/1/3/2/3/132303164/ninux_medaxodugerulip_tefemo.pdfIn PDF document text
    • https://mokadipubozot.weebly.com/uploads/1/3/2/3/132303064/292bb.pdfIn PDF document text
    • https://doxagazezuzizum.weebly.com/uploads/1/3/1/6/131606815/puvozebi.pdfIn PDF document text
    • https://kifezitiwiwafu.weebly.com/uploads/1/3/5/4/135400929/189673.pdfIn PDF document text
    • https://rujogapojepon.weebly.com/uploads/1/3/4/5/134597846/141150.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f04caac-0219-4423-992f-b8474b34e1de/how_to_fold_up_a_teeter_hang_ups.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88549d09-e471-444b-8f0f-adf0753ec5ad/christmas_carol_animated_movie_jim_carrey.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96aa66d2-5f88-42a5-9bae-a6e796ee34aa/26537125418.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/495d5b88-a59b-489a-85e5-6a41da8fdc68/ge_washing_machine_timer_knob_repair.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab496d0d-c582-4924-9bb2-c451d2773f18/kafow.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_off00010193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10193 5528 bytes
SHA-256: d97f28316d7a372fd57d98ab4154e5362d2c90f00d8412902bd0effd9ad88496
font_01_sfnt_off00011470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11470 11052 bytes
SHA-256: 2658ba1fa0d157aad5cf18eb912f2f3cd2383b2185e328496dd01261723256cf

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