Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d390f11424face3…

MALICIOUS

PDF

99.5 KB Created: 2021-06-12 17:52:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 896beffd4a8cfc4fdbab0a2e3fe7df92 SHA-1: b61ca1ae3388cb46224f0647da7bff01e8afc8f1 SHA-256: 9d390f11424face3f3dee770adfd07041eb87c152c045467a0d79744988a65fa
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9831

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://maypoin.ru/123?utm_term=ashoka+full+movie++filmyzilla PDF link annotation
    • https://renunuvejo.weebly.com/uploads/1/3/4/7/134710344/bofawagukiw.pdfIn PDF document text
    • https://bifupepazabar.weebly.com/uploads/1/3/4/7/134740405/wasot_ludosadujopeza_buluxaf.pdfIn PDF document text
    • https://nagejezesalu.weebly.com/uploads/1/3/0/8/130874580/8bc975482.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426260/normal_5ff612ad69711.pdfIn PDF document text
    • https://vawoxaju.weebly.com/uploads/1/3/1/3/131379227/8508733.pdfIn PDF document text
    • https://watinamubil.weebly.com/uploads/1/3/0/8/130813586/5449037.pdfIn PDF document text
    • https://xotiroxo.weebly.com/uploads/1/3/0/7/130776105/0b75571b0.pdfIn PDF document text
    • https://guladusive.weebly.com/uploads/1/3/0/9/130969442/d928bf5e3136a98.pdfIn PDF document text
    • https://molipexizeji.weebly.com/uploads/1/3/4/6/134693273/c19230074b.pdfIn PDF document text
    • https://xazefobilizap.weebly.com/uploads/1/3/1/3/131384081/aac485936588365.pdfIn PDF document text
    • https://sawotulexude.weebly.com/uploads/1/3/5/2/135298589/lebuso.pdfIn PDF document text
    • https://votuwokikinoso.weebly.com/uploads/1/3/4/4/134466575/tepijiranajijosasose.pdfIn PDF document text
    • https://delezebewokumod.weebly.com/uploads/1/3/0/7/130776218/1b379.pdfIn PDF document text
    • https://dinelelulom.weebly.com/uploads/1/3/4/3/134308509/93c76cd.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/1270376.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462345/normal_5ffe85a020ae6.pdfIn PDF document text
    • https://kavovukabej.weebly.com/uploads/1/3/4/6/134621515/tikilotezizinu_gidoxibibat_jebonasikin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387816/normal_5fce4660b8850.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405190/normal_6050ce1a5f569.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/97da0a3d-2c0c-4b93-ad36-815fcb3c6f7a/88181830432.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51330749-fecc-4f48-a32d-78abd0ee9ee4/does_the_pilot_light_stay_on_in_a_gas_oven.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3122a2bb-9e1f-4179-94b9-961becfe4a19/what_does_industrial_organizational_psychology_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c86f590-1bfd-4fbc-8ad1-2b081152d9ad/why_the_bible_is_inspired_by_god.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e0b9e77-f105-4b9f-84d4-03f6bea9fc51/american_idioms_and_phrases_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fa97ef9-6753-4abc-a1bc-b9771fdc95be/wendler_531_boring_but_big_results.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d790b0bc-df4c-44fc-8b84-a671f1d54e28/motu_patlu_cartoon_2020_ka_movie.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAB 5176 bytes
SHA-256: 9c08b0dfc6e5b801846f856f3f2e71786d4a84115453b8e7d8963c77b028c018
font_01_sfnt_off00010f39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F39 3720 bytes
SHA-256: d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281
font_02_sfnt_off00011a9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A9D 12184 bytes
SHA-256: 2cbddc8a470f8ca5208445888defb60711b9d8845b920613e5e689937ed85135
font_03_sfnt_off00014284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14284 16164 bytes
SHA-256: e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6
font_04_sfnt_off000157d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157D8 12336 bytes
SHA-256: cad2c002630152c89540446222ff1bb49d01a751b8c640783ac3bb9ef5a08e48