Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f17e2f776b37df4…

MALICIOUS

PDF

86.5 KB Created: 2021-05-03 13:30:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 770c637b36f9d33648a1aee5cfd1f1e9 SHA-1: 5970e83f65bed3b5a39c70af4f73a759d9d98140 SHA-256: 7f17e2f776b37df4d401ee0546d52ec66d4f855862503eee9c56a858110e3885
164 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 an urgency-based 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 0.9997

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://crophysi.ru/strik?utm_term=dan+kennedy+marketing+books PDF link annotation
    • http://becloud.website/after_cast_landonchcno.pdfIn PDF document text
    • https://vewiwuxipax.weebly.com/uploads/1/3/2/6/132681682/5859018.pdfIn PDF document text
    • https://sopoxovolofu.weebly.com/uploads/1/3/4/5/134509961/jabiwas_zusada_zugobugapunikut.pdfIn PDF document text
    • http://loxalidigitoja.iblogger.org/causes_of_acute_appendicitis.pdfIn PDF document text
    • http://chebsvet.ru/are_plot_and_storyline_the_same_thingcrzl0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/kufowobegapedamuxeti.pdfIn PDF document text
    • https://6f8cb219-4830-455d-9ced-b55e65700e85.filesusr.com/ugd/fd30ac_2ab9daadbc5440e2b20294a3e574e5f0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/salade/how_much_weight_can_a_15_ft._trampoline_hold.pdfIn PDF document text
    • https://2efabd41-1f95-43d0-8245-5f8eb9267247.filesusr.com/ugd/2f4ddf_d03cd9c48c43467ba555d3c7ba31bcd1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kuxegu/84262099033.pdfIn PDF document text
    • http://guruwemuzotal.epizy.com/getedas.pdfIn PDF document text
    • https://104e0e48-a4c2-4a03-8647-06ef64d4e6ac.filesusr.com/ugd/e2c6c1_f0dd12464ec24905b5ed66b1a780571b.pdf?index=trueIn PDF document text
    • http://geboxopok.rf.gd/element_tv_remote_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/sobulobesetuniwoxuvizev.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/robin_hood_2018_film_actress_name.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDEE 5416 bytes
SHA-256: 57b0735304de3bceb0a5ae14f35a821e32c4e9b960499f56625474c8096668c5
font_01_sfnt_off00011057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11057 11124 bytes
SHA-256: df2cd6f0b026bde017c8b1f1794590b5574aca0b5c520459e61bb232d8319747
font_02_sfnt_off0001368e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1368E 16616 bytes
SHA-256: 7ab81ce3d92a9ec80982bbbf7df4378fdf9290867a146be245f32411f9d17586

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