Malicious PDF — malware analysis report

Static analysis result for SHA-256 01a74a05bf95a970…

MALICIOUS

PDF

86.6 KB Created: 2021-03-20 08:52:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3ea614f14223466266afcd19df652f10 SHA-1: 9a4cd51cefb4b0c224bc4beda73eade7a595a981 SHA-256: 01a74a05bf95a9706910be7c4232b29f7e8e3d9e40bd66e126ea3ee46797925a
186 Risk Score

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 0.9998

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://zajinet.ru/strik?utm_term=water+normal+map+shader+in+maya PDF link annotation
    • http://nebemor.mywebcommunity.org/can_you_pair_multiple_logitech_mouse_with_usb_receiver.pdfIn PDF document text
    • http://rajudadude.mygamesonline.org/79334029394.pdfIn PDF document text
    • https://dosodufixelo.weebly.com/uploads/1/3/2/6/132682620/9054071.pdfIn PDF document text
    • https://suwesinorilofev.weebly.com/uploads/1/3/4/0/134096988/voxujusobal.pdfIn PDF document text
    • http://xazupadapafow.mypressonline.com/biblia_de_estudio_inductivo_editorial_vida.pdfIn PDF document text
    • http://sarawavenudiwap.mygamesonline.org/bartending_for_dummies.pdfIn PDF document text
    • https://zomuguwiremadak.weebly.com/uploads/1/3/1/4/131406071/misuzalepi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4192d618-ecd7-4808-8485-efd4d6773ded.filesusr.com/ugd/17a5db_f303e07d71284fa08d4b7b6d627a71ea.pdf?index=trueIn PDF document text
    • https://7605c768-a471-4169-85a9-0dab509fd250.filesusr.com/ugd/20ab23_59b7c565c5b4488387519ee655d890c9.pdf?index=trueIn PDF document text
    • https://a52dd608-e7dd-4d50-8005-e0fd7a3896b4.filesusr.com/ugd/43d2fc_4519c53588a04dcaa3ad1d778cc270cd.pdf?index=trueIn PDF document text
    • https://f8d4b294-f952-4a11-85e8-0a3036f9bdaf.filesusr.com/ugd/ad8f3a_1a79535790b24bc2b16dff2da0f38c5d.pdf?index=trueIn PDF document text
    • https://77a80da1-97a3-4b40-ba11-54c6d232eb66.filesusr.com/ugd/39a0fd_95053b9efee946909ad2d1a3c0bd61d3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/21e80ad6-46ff-47d2-abef-0108811aa580/gakenugubu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e55238bb-066c-4488-8ee6-c2884643abb0/52887050610.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c3c671e-229e-442b-83e5-125b23f36ec4/james_patterson_books_2019.pdfIn PDF document text
    • https://6478d21b-237c-41b5-add8-96d7b9819624.filesusr.com/ugd/c7ef1a_4da2b10e5a124fe0af70a9767d4e273b.pdf?index=trueIn PDF document text
    • https://cb47f074-0476-4434-b381-5672a365cab8.filesusr.com/ugd/c46c8a_fa717ff830644f969ae18446824c06f8.pdf?index=trueIn PDF document text
    • http://fusozevukatamir.atwebpages.com/83463791323.pdfIn PDF document text
    • https://f9c81679-ddb1-4746-ab40-32673edc426c.filesusr.com/ugd/2eff39_eb124857181b4937a1eadc93b70516e3.pdf?index=trueIn PDF document text
    • https://921790ca-7b53-43bd-a25d-275d6f056404.filesusr.com/ugd/9d24cb_32797f79cfb9400fbd5a055a0048990a.pdf?index=trueIn 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_off00011540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11540 5312 bytes
SHA-256: 5f06ae29e73081272ceeb607d470c4533c967124d2738043cb6652710c7da718
font_01_sfnt_off0001272f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1272F 11360 bytes
SHA-256: 630d29374b6c22a770b21be814ac20f84c854038633599f83d3802eea8a44b21