Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a1b5206ed4d47a8…

MALICIOUS

PDF

79.8 KB Created: 2021-02-17 01:15:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a00e57d8c6942492d80949aeed02f927 SHA-1: ea30fae4f8e8fcc75d52bdb7cf79e210e6abe869 SHA-256: 7a1b5206ed4d47a88dc050e309013decd8ba384c69fc5002fb4060d371b35db8
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, a common tactic for phishing or malware distribution. The heuristic PDF_SEO_LINK_FARM indicates a large number of links, and the ClamAV detection as Pdf.Phishing.Trojan suggests malicious intent. The document body, though heavily obfuscated, contains text related to setting up a personal hotspot, likely a lure to encourage users to click the embedded malicious URLs.

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://maypoin.ru/123?utm_term=can%2527t+set+up+personal+hotspot+verizon PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4386089/normal_5fcf2f5d3fe2f.pdfIn PDF document text
    • https://cdn.sqhk.co/jekidase/jgjiwBb/hidden_objects_rustic_mystery_society_help.pdfIn PDF document text
    • https://zexakadobad.weebly.com/uploads/1/3/2/6/132682290/limajovedomija.pdfIn PDF document text
    • https://vakumijajuxos.weebly.com/uploads/1/3/4/4/134465568/312674.pdfIn PDF document text
    • https://cdn.sqhk.co/powitaxixu/jiddAcZ/monorail_drawer_track_roller_kit.pdfIn PDF document text
    • https://ferateritilew.weebly.com/uploads/1/3/4/2/134265971/gisotodimepipik.pdfIn PDF document text
    • http://dasiroxejipi.22web.org/34869981903.pdfIn PDF document text
    • https://cdn.sqhk.co/tokititagiwe/Drhcjdn/write_notes_on_memory.pdfIn PDF document text
    • https://cdn.sqhk.co/jipogidara/c2gcmgg/king_s_raid_hilda_special_dungeon_1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480750/normal_5fd1b7d74001b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375351/normal_5fe3f68c2152e.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/zonebon/mechanism_of_action_of_acetylcholine.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/10656781683.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/7958960825.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/31705039541.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/greetings_and_farewells_in_spanish_worksheets.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F6 4956 bytes
SHA-256: 1bbf489380f9bcd9b296ae71bdd048796d574c31b6431535440f0b8ebe3137a6
font_01_sfnt_off0000f5da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5DA 11140 bytes
SHA-256: 34de9817062a93c996c6fbfb3e3b07de37317bcb618f703c7818e3f7fd9217c6
font_02_sfnt_off00011c0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C0F 16312 bytes
SHA-256: 531e37f64a2e7dc3bfb257675d9e6c644c7b1597f33ba9a969cd005a7ed65660

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