Malicious PDF — malware analysis report

Static analysis result for SHA-256 05ade68fb2c07a31…

MALICIOUS

PDF

46.1 KB Created: 2020-03-14 15:56:54 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 7418238b0d72814c59009d11a3598ee5 SHA-1: 1aef3b7809b18e36dece97ab9159813b75ceecb3 SHA-256: 05ade68fb2c07a31b3bc96205efcfa1a20d3436446e097c0b2a73b887c788722
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to PDF files hosted on various domains. The document body text mentions 'Automatic voice call recorder free', suggesting a lure to entice users to click these links. The ML classifier strongly flagged this PDF as malicious, indicating it likely leads to a malicious website or a further stage of infection. No scripts were extracted, but the extensive link farm suggests a content-driven lure for initial access.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 http://host80.carmichaelnl.com/uploads/1/3/0/2/130289063/130289063.html#automatic+voice+call+recorder+free PDF link annotation
    • http://t24player.live/uploads/1/3/0/6/130604517/jabubelorobej.pdfIn PDF document text
    • http://smoothiusmaximus.com/uploads/1/3/0/5/130542907/tujiwotumilapam.pdfIn PDF document text
    • http://vaylenclothing.store/uploads/1/3/0/6/130639807/8b9f4c2739.pdfIn PDF document text
    • http://midwestvegfest.com/uploads/1/3/0/8/130813796/sadonu-jufekasuk-dajosel-limulawanobipem.pdfIn PDF document text
    • http://bandbwindowandguttercleaning.com/uploads/1/3/1/1/131164572/9623387.pdfIn PDF document text
    • http://www.cambridge-international.co.uk/uploads/1/3/0/4/130477455/fasawexubalozu.pdfIn PDF document text
    • http://www.theroostatyorkharbour.com/uploads/1/3/0/3/130312912/gomofen_buradanebopu_laxubopefifadin.pdfIn PDF document text
    • http://timus.net/uploads/1/3/0/8/130874307/bopusapawuja_finujuruvawones_pifutakog.pdfIn PDF document text
    • http://photographmybusiness.com/uploads/1/3/0/6/130639203/xozuwuwetepiniku.pdfIn PDF document text
    • http://mysprout.shop/uploads/1/3/0/7/130739170/3753530.pdfIn PDF document text
    • http://www.yesterdaysneighborhoodtoday.com/uploads/1/3/0/2/130270864/kilimesim.pdfIn PDF document text
    • http://newvisionedsolutions.com/uploads/1/3/0/6/130620684/44482d6.pdfIn PDF document text
    • http://fssthames.com/uploads/1/3/0/5/130551253/zusezakadutenob-lulofemese-detemid-zegulubozif.pdfIn PDF document text
    • http://adamsoldit.com/uploads/1/3/0/2/130272070/cca13b97f1.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://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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000075f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75F9 8192 bytes
SHA-256: feac7c06d4c584286448489d684d678ffc66a2fb72112922d749ae79eecd576d
font_01_sfnt_off0000959e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x959E 16164 bytes
SHA-256: 32b54217619f9438721b423dc2f4f4da0f78781b0811ea49af2be6b0310ecf56

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