Malicious PDF — malware analysis report

Static analysis result for SHA-256 7adb286cce9497e8…

MALICIOUS

PDF

43.9 KB Created: 2020-03-23 08:47:31 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f1e9d3fc1e4f328f624387a9d1d3c76c SHA-1: 9c42eae39c1065edb1ee4a8c342eaacdedcbd3b0 SHA-256: 7adb286cce9497e85fb61256f0b6d6d4250e5fe3013e6550dc9796663b4c9624
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links to other PDF files hosted on various domains, indicating a link farm or SEO spam operation. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the sheer volume of outbound links suggests an attempt to drive traffic or distribute further content.

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://cinderellascleaningcompany.com/uploads/1/3/0/6/130640200/130640200.html#step+by+step+salah+apk
    • http://auntiechrist-net.memeland.org/uploads/1/3/0/8/130814575/nejilitusadifu.pdf
    • http://abbydecoratingden.com/uploads/1/3/0/2/130272266/3540218.pdf
    • http://www.michellekendall.net/uploads/1/3/0/3/130323573/gaxoxoveme-gajek-tizezivotin.pdf
    • http://www.resinworks.shop/uploads/1/3/0/7/130775723/koxipokawaxamefek.pdf
    • http://wemadeamillionaire.com/uploads/1/3/0/6/130639931/lixojal-venizezazijeged-mufopifomo-remitigojoweli.pdf
    • http://jethachan.com/uploads/1/3/0/7/130739139/53bb3dc7586a1.pdf
    • http://relaysecurity.com/uploads/1/3/0/2/130272369/fesopovawi.pdf
    • http://writeandnerdyblog.com/uploads/1/3/0/5/130538949/fiwonabuj.pdf
    • http://www.vb-3design.com/uploads/1/3/0/7/130740496/sobotepobeba.pdf
    • http://hostmaster.kumisillustrations.co.uk/uploads/1/3/0/2/130271045/rutonevu.pdf
    • http://clubxboxpodcast.com/uploads/1/3/0/6/130622002/1e1ca.pdf
    • http://16yji.fwyso.com/uploads/1/3/0/4/130488699/xoverojo-runipojidezi.pdf
    • http://mapneedsusa.com/uploads/1/3/0/6/130605403/jolujol.pdf
    • http://eventshutter.com/uploads/1/3/0/5/130544448/b4d34a.pdf
    • http://thekarmaofbeinggay.com/uploads/1/3/0/4/130476098/xinaxileligigibili.pdf
    • http://hamtakacademy.com/uploads/1/3/0/6/130640010/47a42c4a0cd7d04.pdf
    • http://www.gardentherapybliss.com/uploads/1/3/0/7/130774982/7644184.pdf
    • http://nastynotfound.com/uploads/1/3/0/3/130379333/0897366fd49.pdf
    • http://cindishaffer.com/uploads/1/3/0/6/130605122/37e63fdc6.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007079.bin
a11fb4232e54ba0b7012cd31e262494ccf9affca82591cbbcadf89ac2d7cccdd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7079 1632 bytes
font_01_sfnt_off00007859.bin
a6017a63907fb24e1eddd91fc62bb38f4ccbcf335ae23aefe75dc5223a38a059		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7859 8512 bytes
font_02_sfnt_off0000980d.bin
f1a7bb3ae7e6124e0c59e17a38430fbb2970afe7f9aa57ea1f61265bce8f83d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x980D 2700 bytes

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