Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc711f412b2f04b7…

MALICIOUS

PDF

74.1 KB Created: 2020-10-27 16:42:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 40728b6414904adf301fb4724f876150 SHA-1: 2fd4412a8908b492d18cefc918217b184b9b3248 SHA-256: dc711f412b2f04b78f6c6b1540a08cf11dd53b50c334e7707d5db2cbc7ab6b2f
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/strik?keyword=proportional+to+symbol+alt+code In PDF document text
    • https://vanawolibonute.weebly.com/uploads/1/3/4/3/134344109/540cd884c6ea9.pdfIn PDF document text
    • https://keminugugenoxag.weebly.com/uploads/1/3/4/3/134321568/jifutisapelikowudax.pdfIn PDF document text
    • https://vupimolafi.weebly.com/uploads/1/3/1/3/131398504/6799064.pdfIn PDF document text
    • https://wawukonuxoni.weebly.com/uploads/1/3/4/0/134095992/jevotajavonux-kikaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a436bbad-98ed-46f9-b4f6-ec71e30baa27/fiche_monnaie_ce2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/833ebd18-8175-4612-b1e0-7dd163b34eb9/magozuvivam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72d1d581-80e9-4a23-b96b-ec54643e10a9/tawukenukitaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db906d3b-6116-417a-9888-6290a987c6ca/belivanu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa54d71c-570f-4045-94fe-fc3f9e4905bf/how_to_be_right_greg_gutfeld.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3f469bd-ebdc-49d6-b7f6-38a43b55c55b/bobbili_raja_telugu_mp3_songs_free_d.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6016d3bb-3480-4498-ba65-ee4f98cb9b42/badofefojogelesajejonipuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71c97c84-87d7-4077-9b92-46d435036635/63223311874.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5190355a-b6d4-42aa-85df-86384b9ee10b/dopopes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8b4315c-b4a8-4e37-b2be-ab951f7efcda/rinuluradafa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a7a030e-58f6-4665-8b53-1e90d70b1ec6/43063300743.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28d1494d-6387-463b-acff-2bbad6cc38a5/fatowexamijinirutelegiwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4436efc-6bc9-49f6-a35e-be265db61484/xoxokovenader.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/9375/5590/files/68009168256.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5940/7765/files/denoising_autoencoder_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3025/6536/files/thieving_guide_rs3_1-99.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/4862/1987/files/22546760332.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7693/4042/files/velvet_rage.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/bookkeeping_and_accounting_for_dummies_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/kalafikuni.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/17270144631.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/53428915789.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/best_voice_reader_for.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
    • 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
    • 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

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000085fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85FD 6824 bytes
SHA-256: 535dc0eea435f0faf238c2281c269a71c410df83da2e796e06ebb0bf3e81966e
font_01_sfnt_off00009731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9731 5464 bytes
SHA-256: 156fe2d3d20855e2cec8eb98f9b341eb763acf0774547379774aee4d6a977419
font_02_sfnt_off0000a95f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA95F 6772 bytes
SHA-256: d3f8adbe975cb40784ec452d64246b17052e3a82b7f1d047bc7f116d7fb3b753
font_03_sfnt_off0000ba6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA6D 3732 bytes
SHA-256: eccd7093e8647bc001921b5424ab5728d55a63b38c376480a61cc99e273a228b
font_04_sfnt_off0000c7cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7CB 13720 bytes
SHA-256: 9b1ddfea00bb52a0600a6329d5cd6d651b7fcab5d42055174d5149d4a1c2118d
font_05_sfnt_off0000f594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF594 21388 bytes
SHA-256: 21161963337002278a8b6b7313bfa5f6c8dad979e3acf318d7b8302b43a20970

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