Malicious PDF — malware analysis report

Static analysis result for SHA-256 893308f222775e4b…

MALICIOUS

PDF

103.9 KB Created: 2021-03-14 20:51:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 7fc0c631f61b3b29973d7d1513ba9faa SHA-1: 6d2abe0693e732267816987fa6b2ba08a3bc4389 SHA-256: 893308f222775e4b4acdb9def84ad7376d4d0c9ab170c6463e22fc050358f0af
186 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate a large number of links pointing to external PDFs. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the document's structure and embedded URLs point towards a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://mezovuduw.ru/wix?keyword=soil+texture+triangle+worksheet+answers PDF link annotation
    • https://cdn.sqhk.co/fonizijodi/hblRjh0/miranda_lambert_husband_hay.pdfIn PDF document text
    • https://puwikopigab.weebly.com/uploads/1/3/1/1/131163601/9f871fb77662f.pdfIn PDF document text
    • https://cdn.sqhk.co/xeduwukaxusa/gjyECig/vakirifafafemijotujosavav.pdfIn PDF document text
    • https://cdn.sqhk.co/resozasevej/igDN4Z7/sugikazizibisifaj.pdfIn PDF document text
    • http://trokot-shtorki.online/27875139512ai1in.pdfIn PDF document text
    • http://bioforcecolumbia.site/668300710640f82x.pdfIn PDF document text
    • http://idealslim-italiaofficial.site/brain_anatomy_coloring_bookjcd7t.pdfIn PDF document text
    • http://odebayitrafikhizmeti.com/ti_84_calculator_online_free_no_downloadzsjxu.pdfIn PDF document text
    • https://cdn.sqhk.co/lolatonuvesa/ztchjjf/weather_liverpool_ny_hourly.pdfIn PDF document text
    • http://trenketo.buzz/46444678701cxce7.pdfIn PDF document text
    • https://jawimuxuketeg.weebly.com/uploads/1/3/4/7/134763527/xekep.pdfIn PDF document text
    • https://cdn.sqhk.co/bujasugawo/UJieghd/62917455376.pdfIn PDF document text
    • https://vizejuvevu.weebly.com/uploads/1/3/2/6/132681979/6954336.pdfIn PDF document text
    • http://twirlini.com/razes_do_brasil_o_homem_cordialmbg5s.pdfIn PDF document text
    • http://cashbackmoney.info/fovorukanupolarozfuz1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sixolose/vudisixurukom.pdfIn PDF document text
    • https://204833c8-abda-4421-8777-5048ee7dd919.filesusr.com/ugd/e30b7a_911f37f1ab9b46739ba7c4d1eb2bdfc2.pdf?index=trueIn PDF document text
    • https://80172413-d145-4b71-b7cf-4a007d76ad29.filesusr.com/ugd/cacfd7_bee805417fe04e878e01110b4516f1fc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/bible_in_easy_english_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/sajitobutugegig.pdfIn PDF document text
    • https://3568c1c9-c281-4b9a-9ea9-d5d291e0176b.filesusr.com/ugd/e5d8db_ea0dc1a0ea31474f848fc3b62f9e5ecf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/roxawo/mixiranovugunijubi.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E5 3908 bytes
SHA-256: 84b48a306b82a11fef46d727a65bce3fdb32ab1180e2d4c807a826ccc2597215
font_01_sfnt_off000110c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C7 5156 bytes
SHA-256: c6bd862fa9e7f7d4a6022fc9f51e065e6ed51cb700a440f0af8ded401c8c1e32
font_02_sfnt_off0001224e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1224E 1776 bytes
SHA-256: 036c10b1c4bdf870ecdb8f83065e5591c4773fd5c02de026bb7f175eb6757cc2
font_03_sfnt_off00012b17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B17 14208 bytes
SHA-256: a972632d032ebc49aebd53bb8ed255dd954329ec646251f74f85a7fb823d70b4
font_04_sfnt_off00015bc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BC7 16420 bytes
SHA-256: e1a114de7891a046c60f0442c79a7df17c9b90e55fc20cb1ddf83c1060723b7a
font_05_sfnt_off000171f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x171F5 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
font_06_sfnt_off00017fb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17FB6 6420 bytes
SHA-256: 82acba0e29110a0f3d385a80e1936702e6bc11a43f1ae959dd5d870c6bf46479

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