Malicious PDF — malware analysis report

Static analysis result for SHA-256 d983220c7588fcdd…

MALICIOUS

PDF

66.5 KB Created: 2020-11-22 00:04:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 86811a7d13bef59cf0e110e1dab6a879 SHA-1: d3e56c9af7b076eee91d32ad71cb20ab3a7007ad SHA-256: d983220c7588fcdd88f572f3b6005a67d0d8722019a3ca7d80299a7361dee27a
156 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 5

  • 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.
  • 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://traffking.ru/aws?utm_term=nuwave+pro+infrared+oven+cooking+guide PDF link annotation
    • https://jarapitoxedomel.weebly.com/uploads/1/3/1/4/131437170/f159fdf8ac8c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426695/normal_5f97ec66bdcfb.pdfIn PDF document text
    • https://sipexagugiresu.weebly.com/uploads/1/3/4/6/134607427/sevexoxofoxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459025/normal_5fb4e08c2bf44.pdfIn PDF document text
    • https://mepopuwiv.weebly.com/uploads/1/3/4/4/134499337/dosejun.pdfIn PDF document text
    • https://loguxofe.weebly.com/uploads/1/3/0/7/130775118/bc44ba.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/a186deca-4eac-4995-859e-65e655e5a6c9/38096258199.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/gutofevotujevexolo.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/88381048201.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/cinema_apk_app_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/bluetooth_keyboard_android_change_layout.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/nonobapudaluberilarop.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/cavaleiros_do_zodiaco_online_jogo.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_off0000c996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC996 5300 bytes
SHA-256: 7e9a4b5c62a33b91fab5fbb0106b91296354c972f3a878acbc4d745dd56928b1
font_01_sfnt_off0000dbd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD2 9864 bytes
SHA-256: 70ad94abbb5b6cd58914452f8bd221d76ff1d008e929c7e1d39415b2beb95490