Malicious PDF — malware analysis report

Static analysis result for SHA-256 9add70fd8683d7e0…

MALICIOUS

PDF

70.2 KB Created: 2021-04-01 04:23:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d4c6d6029db1d32c6e690e3c30676eaf SHA-1: 174110bcb2a9352e2304eb2ec239a13e2ffcfc83 SHA-256: 9add70fd8683d7e06639be12e98fbb97891dc003a24fb31fc47463616c32cd32
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 0.9998

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://seumenha.ru/wix?keyword=mca+item+sampler+science PDF link annotation
    • https://mazaziwijofe.weebly.com/uploads/1/3/4/7/134757439/pumelusuduvulatat.pdfIn PDF document text
    • https://satomasutal.weebly.com/uploads/1/3/2/6/132681949/bcbb3669733.pdfIn PDF document text
    • https://gataveboturifon.weebly.com/uploads/1/3/1/1/131164486/62e4e7.pdfIn PDF document text
    • http://allfreebets.ru/80988424517ysgbo.pdfIn PDF document text
    • https://nefabilaj.weebly.com/uploads/1/3/1/4/131438225/8ad898.pdfIn PDF document text
    • https://taxezuwijukiwum.weebly.com/uploads/1/3/1/6/131606901/8018747.pdfIn PDF document text
    • http://detonicufficiale.website/fetedobuse4ynoq.pdfIn PDF document text
    • https://vibofizetukoz.weebly.com/uploads/1/3/0/9/130969748/f3555369.pdfIn PDF document text
    • https://gexamefirizawem.weebly.com/uploads/1/3/4/6/134668325/budizebatenub_zorixin_xiwulozo_laninukavinese.pdfIn PDF document text
    • https://kesevaze.weebly.com/uploads/1/3/1/3/131383297/varuto.pdfIn PDF document text
    • https://rilawexiretik.weebly.com/uploads/1/3/4/2/134267086/823a1e2da.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/e18c7e9a-9019-4a70-9a95-47af13eb5564/speed_queen_tumble_dryer_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abab41be-0b23-45cc-baa2-a3bee2ffd36f/yamaha_stagepas_600i_mixer_stand.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41be80b7-c6c5-4055-946b-2d605c0f749d/isabel_allende_triloga_la_ciudad_de_las_bestias.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/dulimusabekuzid.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/coming_soon_template_html5_responsive_free.pdfIn PDF document text
    • https://s3.amazonaws.com/liluvad/ullathai_allitha_movie_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/ropojuforago.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6e6c3e9-37ec-4e8f-96fa-00fc9f2ee5d4/how_to_learn_algorithms_easily.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/30136668923.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_off0000d841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD841 5084 bytes
SHA-256: 263f168ad18c22c3e5cbca2e7141d923e4992fbb8aa35680b726ce93a4bc231c
font_01_sfnt_off0000e97c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE97C 10184 bytes
SHA-256: af3f2045eeae0c26f66a9a5113185e2fd279ebc33b00c0ff87ebe7cf6bc5bfdd

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