Malicious PDF — malware analysis report

Static analysis result for SHA-256 507943736c00a0b4…

MALICIOUS

PDF

72.9 KB Created: 2020-12-18 02:20:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 26d7a11dfcc5674d1f3b0e05f2c9cffe SHA-1: 1c150d423b66ade1e44aa0adf339b6d366127a61 SHA-256: 507943736c00a0b40c25121c1ca588d1b38253576b5a779968929f5d8c530212
156 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 0.9997

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://trafficel.ru/strik?utm_term=flat+garden+hoses+for+sale PDF link annotation
    • https://kidivine.weebly.com/uploads/1/3/4/5/134576756/1609931.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/wiremeresegikon/arc_hydro_tools_arcgis_10._5.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/nosivagefabor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d897b6c-cb73-4f0b-8122-351892c14ede/77226233438.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06a512be-3be9-4dfd-8efe-6a9b8e333ecd/parental_care_in_fishes.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/azhar_video_song_tinyjuke.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/soundpeats_true_wireless_earbuds_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7281a579eee3ae06c48d5/t/5fcc65383ff1011540e8908d/1607230777253/raximuxiworekoxumaxiwo.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/6th_class_mathematics_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48b0ae7d-0319-4985-afd5-5c524e4246b7/tomtom_trkiye_haritas_2017_cretsiz_indir.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/56665484688.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/bhajan_song_website.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB3E 5124 bytes
SHA-256: bc98b6d521b8ef03c6d366f3be854100812c1e63f11abdca7c84c979f6be8a69
font_01_sfnt_off0000dca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA7 10984 bytes
SHA-256: df1e163c93e447918f67b818ad5e683660287d652250fa52db1372029b35efa3
font_02_sfnt_off0001023e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1023E 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848

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