Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cc4f4380c0c6a3d…

MALICIOUS

PDF

64.9 KB Created: 2020-11-29 08:35:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 503ecf914e0a661f6c377449e6e59c5e SHA-1: 1fdd88ed29c6423dbcff3cd524be77cf6ceac1eb SHA-256: 6cc4f4380c0c6a3d971e31f583be88d5c039220c0f040675cb83aecc278de03f
222 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, routes users through malicious redirector infrastructure and presents a deceptive download button. 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gettraff.ru/aws?utm_term=cashflow+game+mod+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4403543/normal_5fa2eeb5dfde0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460042/normal_5fc1d2db48896.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405467/normal_5faa0748f2bd2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421335/normal_5fbf28bd2a1d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477367/normal_5fb8815cb3093.pdfIn PDF document text
    • https://guserokofetaw.weebly.com/uploads/1/3/4/3/134341966/7008244.pdfIn PDF document text
    • https://tatunonomufobuf.weebly.com/uploads/1/3/4/3/134355176/wuted.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414494/normal_5fbbcbb7a8777.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/xulepiwa/bully_dog_power_pup_gas_er.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/384661cc-d43d-4b3a-80ff-715622d423af/csc_lawyers_incorporating_service_michigan_phone_number.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64a18044-b377-4313-855c-0966fb41544b/nukupagapifuritax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3f2b14b-f4b6-4cf4-9e1b-af9a396ad772/zuxadag.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/nitozobajipodokex.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/ugg_thomsen_boot.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/dexapogemit.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_off0000bdff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDFF 5420 bytes
SHA-256: 75f7414b1e6b63ef3662d8d3485acf20b84ca466406cec6e57ac8d9dfd8f1992
font_01_sfnt_off0000d060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD060 10972 bytes
SHA-256: fa6481e91bc7ecfc12315b628ce238fffb80b4eb6af9ecfd7173ed7a71d5f8b8

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