Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3648732676b1617…

MALICIOUS

PDF

79.7 KB Created: 2021-03-25 00:42:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c957d833260bb0b7ff2f054f6678e146 SHA-1: 1d57777afb6e65153ef572bebfb785065574658f SHA-256: f3648732676b1617f1692b49c34f26142ce552da48f0731b77bff1c976b20de7
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://vilenefex.ru/strik?utm_term=ccrn+review+questions+free+online PDF link annotation
    • https://fowezojufogomod.weebly.com/uploads/1/3/5/3/135307270/vagop.pdfIn PDF document text
    • https://gilurumujeluzem.weebly.com/uploads/1/3/1/8/131857598/tezixi_bilakatoxas_vutupiposoved_suripiwariji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424027/normal_605505e580c4a.pdfIn PDF document text
    • https://kiwakamumosa.weebly.com/uploads/1/3/5/9/135963193/6007042.pdfIn PDF document text
    • https://kepijifawobi.weebly.com/uploads/1/3/5/3/135388201/8437595.pdfIn PDF document text
    • https://gosibipidumoduj.weebly.com/uploads/1/3/4/3/134318513/biruxowi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454575/normal_5fcd1001c9348.pdfIn PDF document text
    • https://nofuzibid.weebly.com/uploads/1/3/1/4/131453406/gonumovuxarewelogo.pdfIn PDF document text
    • https://fufivivol.weebly.com/uploads/1/3/0/8/130873849/4789984.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383923/normal_60265b599d0a9.pdfIn PDF document text
    • http://xiruzox.mygamesonline.org/lenovo_y50-70_driver_touchpad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481065/normal_600ed62e1544b.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/tubukeganuji/sefuxalopetumoponifikubix.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/62890489292.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/surf_report_manasquan_inlet_nj.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/poulan_pro_pp4218a_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c8ad7e9-58c7-4a0b-ba7e-07bdfe23c12f/84288614572.pdfIn PDF document text
    • http://terumalok.atwebpages.com/thinking_in_java_italiano_download.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/radifogavatiwewevime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/667f095c-8265-4753-8c0a-ced491dde8d9/pirabasupaxagikigixowu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/391fb342-d8f1-453f-a970-a7dda7222551/youtube_christmas_carols_silent_night_lyrics.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_off0000f9bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9BF 4848 bytes
SHA-256: c614ce63846f7c173fe368a842bc6fb00881fb1e29773ae7793f312bba5aac38
font_01_sfnt_off00010a66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A66 11552 bytes
SHA-256: b309dedfbe365abecaa6aebe25384f4fde5329150fa455a56e3c8455cb344cc8

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