Malicious PDF — malware analysis report

Static analysis result for SHA-256 f13daf7b55892983…

MALICIOUS

PDF

78.7 KB Created: 2021-02-21 19:13:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 514e345a50de63b4f582704580a985a0 SHA-1: e2e773f62f5662536c9c3d2524e328e12f9f88c8 SHA-256: f13daf7b55892983ef11cd025b7bb992b6c291898327772b967041041873cd9c
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://leonvi.ru/aws?utm_term=whitfield+pellet+stove+repair PDF link annotation
    • http://setefigidoral.iblogger.org/beps_action_plan_8-_10.pdfIn PDF document text
    • https://cdn.sqhk.co/metevetufi/R0ifjcl/pojevisonipopalumonifiso.pdfIn PDF document text
    • https://wutowenejeboz.weebly.com/uploads/1/3/4/5/134599911/3805117.pdfIn PDF document text
    • https://cdn.sqhk.co/xakurusuk/giFTjg6/77219099895.pdfIn PDF document text
    • https://zotorakiv.weebly.com/uploads/1/3/0/7/130739478/5462503.pdfIn PDF document text
    • https://malitorenifavo.weebly.com/uploads/1/3/4/0/134017021/xopefag.pdfIn PDF document text
    • https://cdn.sqhk.co/sewuvavimebi/hjjhfie/jajobiwulatijitebozot.pdfIn PDF document text
    • https://cdn.sqhk.co/sirobuse/cgfjjg2/mod_scp_per_minecraft_1._12_2.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/zaxuledo/jasipitiwi.pdfIn PDF document text
    • http://zatunikepozis.epizy.com/kopadujegexixeveri.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/philip_glass_metamorphosis_sheet_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/cosmic_microwave_background_durrer.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/68846780671.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/king_size_platform_bed_with_drawers.pdfIn PDF document text
    • https://s3.amazonaws.com/bolovopizonuki/what_time_is_little_fires_everywhere_on_hulu_tonight.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/scholarship_form_online_2019_last_date.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/carnatic_music_books_in_kannada.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF739 5200 bytes
SHA-256: 7ac3e6d3124d401c02be5e62312b746410131207c8d1f2ddf679aad4e5003479
font_01_sfnt_off000108f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F5 10768 bytes
SHA-256: 4b411bb677b8492b167cf1b2499a2f5fa57f016cae8727ff5b123a7ffce04418

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