Malicious PDF — malware analysis report

Static analysis result for SHA-256 a737e504d540b774…

MALICIOUS

PDF

77.0 KB Created: 2021-04-05 17:52:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c6f24f3bd696d822afee463447b2a0f SHA-1: 5157fa23ae7d7ff9e3616e91be091002caf4151f SHA-256: a737e504d540b774fef2f335d85ff22d2ae4206d0efd282fc8270f1113d6d1bc
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL suggesting a lure for an iPhone 6s. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/wix?keyword=win+iphone+6s+now
    • https://static.s123-cdn-static.com/uploads/4476446/normal_5feb9c96b755f.pdf
    • https://cdn-cms.f-static.net/uploads/4495058/normal_604da65258796.pdf
    • http://ruwemipuwev.mypressonline.com/mijibakazutovasesiguvi.pdf
    • https://cdn.sqhk.co/pirujezexod/ckjfjib/37606662246.pdf
    • http://lefibipefazefep.mypressonline.com/43964055119.pdf
    • https://cdn.sqhk.co/jabosuve/eAF5jaC/suzidaxegagupuga.pdf
    • https://cdn.sqhk.co/patagarinixa/b7Yhjgd/69662751979.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wofaxil/donimesipenerexozep.pdf
    • https://c3438639-6a75-4920-aa4f-d1e0b619354f.filesusr.com/ugd/3be3a7_93471c341e5543cf99b86029388fe673.pdf?index=true
    • https://s3.amazonaws.com/savifin/83436626298.pdf
    • https://a49aa754-465e-4bbd-924e-b3d0e7b66bd4.filesusr.com/ugd/81d6a4_cf1e080d9f634904a03f1abc1aac9834.pdf?index=true
    • https://2489a575-72f7-492f-b117-28cfe4a4d2a3.filesusr.com/ugd/d81705_31c9588c15444071b6cda1a3e5bab58f.pdf?index=true
    • https://s3.amazonaws.com/mupukesunobaga/dejelolunew.pdf
    • https://s3.amazonaws.com/kokesatodixon/charlie_and_the_chocolate_factory_song_lyrics.pdf
    • https://s3.amazonaws.com/pivetuzadujo/magazine_design_template_illustrator.pdf
    • https://s3.amazonaws.com/bokexizometun/jipememuginebodufap.pdf
    • https://68f2566a-c586-4d15-a5d1-3a72044c38f3.filesusr.com/ugd/ecec20_1856ebde33db4e54b90a8f82116aa1a6.pdf?index=true
    • https://s3.amazonaws.com/vitelitubovuluj/36412389332.pdf
    • https://s3.amazonaws.com/zuniverijesud/2001_toyota_corolla_stereo_wiring_diagram.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dae3.bin
6bdb704a5d47e7f8c29a082659873e6edfc64a3a3027f40bee011cf71606d81f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE3 4828 bytes
font_01_sfnt_off0000eb69.bin
7380cc88281a9af91e30959a987d702e8185e2d19d5d684d8ff8659b7ca07af0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB69 11544 bytes
font_02_sfnt_off00011227.bin
c9557d91917e40dbb2ce09b7ef560a04a9a832ffe2ebcac6b50408a58351272e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11227 16092 bytes

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