Malicious PDF — malware analysis report

Static analysis result for SHA-256 f78ba0f4f1be9c4f…

MALICIOUS

PDF

133.4 KB Created: 2021-05-06 20:14:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: bbd808a4eb624eeaf079093bdb092715 SHA-1: 81fca9af2e77beb46a2cf2cda82adac35189ddef SHA-256: f78ba0f4f1be9c4f23e0195a3b6221f8b9ef8ef17d1ad732204c7b653fd2919b
176 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. It uses a callback-phone (TOAD) lure. 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 0.9981

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://soxebez.ru/strik?utm_term=nitecore+d2+charger+21700 PDF link annotation
    • http://nikepexi.22web.org/cinema_4d_plugins_collection.pdfIn PDF document text
    • http://jawunefuda.mygamesonline.org/autofachmann_berichtsheft_vorlage.pdfIn PDF document text
    • http://manidat.sportsontheweb.net/derebifezumizoxifak.pdfIn PDF document text
    • http://xonifivi.iblogger.org/2020_kia_cadenza_owners_manual.pdfIn PDF document text
    • http://zokazurimila.mygamesonline.org/rozatonafiba.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/jevopemosod/gymnopedie_no_2_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/bootstrap_dashboard_landing_page_template.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/domiwanedu.pdfIn PDF document text
    • https://e0220c8c-c322-4c33-af83-7c5b0fe00b66.filesusr.com/ugd/a771bd_f4ae5576a4954ffe98c38a4094393ae0.pdf?index=trueIn PDF document text
    • http://samajusinifako.atwebpages.com/kobibimoluviro.pdfIn PDF document text
    • https://s3.amazonaws.com/tixeligufokup/94180642066.pdfIn PDF document text
    • http://bolirazebaf.myartsonline.com/the_chemistry_brand_retin-oil_-_100ml.pdfIn PDF document text
    • https://s3.amazonaws.com/wifukedot/ninevopepod.pdfIn PDF document text
    • https://f61a8d15-835b-4c36-a3db-e4ead73ab13f.filesusr.com/ugd/e9f5f3_c0680d90ccf3484684b6980423dc16b4.pdf?index=trueIn PDF document text
    • https://67dc9804-4028-4298-afd7-d431d2c16fe6.filesusr.com/ugd/559c84_1a7f3867370e476a9d08fbefd7656dfb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/rising_of_the_shield_hero_does_myne_die.pdfIn PDF document text
    • https://a62e46b8-d933-4087-892c-e5439cec6991.filesusr.com/ugd/e9cba9_43fd1f71700a47268d8e77e75b1fdc21.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/16934214485.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/chipmunks_happy_birthday_video_free.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

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a24e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A24E 6440 bytes
SHA-256: 629123bfde0685c5f69bbdd27ec008bde0224d5c30af1dabb990f6ee33ea778e
font_01_sfnt_off0001b211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B211 2960 bytes
SHA-256: 9e8301a812e0963997f2c69c75bfd39e7fcc44359b8a43baf6657440e065e79d
font_02_sfnt_off0001bc81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BC81 5048 bytes
SHA-256: 51f9fa63370e1fbb32a7909071a5580dcd3c397f0be0a6cc1b4665f2c806fb0a
font_03_sfnt_off0001cdc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CDC9 12684 bytes
SHA-256: 253b2ff5098ad2d515db610cc9b3cb95d4c9b162864bf8691af817dd5e4c1857
font_04_sfnt_off0001f910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F910 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3