Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffe17adc8e7a8e11…

MALICIOUS

PDF

84.6 KB Created: 2020-12-23 05:55:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 7902b691fcb57718706da26fcc834209 SHA-1: 8e3e6429485f3eb305af8c113360caa39491718a SHA-256: ffe17adc8e7a8e1184af4d0e715f34e86ef783d902ccf0ba67ef8c876921fa8a
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to benign-looking PDF files, suggesting a link farm or SEO poisoning tactic. One of the embedded URLs, 'https://trafftec.ru/123?utm_term=dvd+recorder+with+hard+drive+currys', is likely the primary lure, attempting to trick users into visiting a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • 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://trafftec.ru/123?utm_term=dvd+recorder+with+hard+drive+currys PDF link annotation
    • https://xumogaveranowiw.weebly.com/uploads/1/3/4/3/134371782/1328371.pdfIn PDF document text
    • https://dupizonax.weebly.com/uploads/1/3/1/3/131380343/3101329.pdfIn PDF document text
    • https://roxuvipiga.weebly.com/uploads/1/3/4/6/134637137/2050389.pdfIn PDF document text
    • https://vixeroniwemeful.weebly.com/uploads/1/3/0/7/130740086/kixogepekovip_kevipomerawo_lumeg.pdfIn PDF document text
    • https://jugefisofewutep.weebly.com/uploads/1/3/4/3/134368120/5572273.pdfIn PDF document text
    • https://tefufujilidawa.weebly.com/uploads/1/3/4/5/134578337/61f0fdf0abc.pdfIn PDF document text
    • https://lokesikaneweb.weebly.com/uploads/1/3/1/4/131437695/508ee9047564.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/viromibukoleliw/dokkan_battle_android_cell_saga_tier_list.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/70062400414.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/implosion_mod_apk_v1._2._12.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/college_student_resume_template_word.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9D 6812 bytes
SHA-256: ca24bdafb8bbb869cbf463ec553f7ebe8fac9d92b2ff95474d77e3f511273adc
font_01_sfnt_off0000ecd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD1 5248 bytes
SHA-256: 42e5a438505bc834af4fada1c914d11a2de34f1094cb5954bd7ce2269dd414d0
font_02_sfnt_off0000febd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEBD 2092 bytes
SHA-256: 9fcfd2b2c12c9d480c0beec3ee39f05b9e518edc5177a7a5fcc68dff0371f8a2
font_03_sfnt_off0001085e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1085E 11400 bytes
SHA-256: d95edd48b2377aee4009157005c9697a4744ffbd92051e7bc458bdaa6488788e
font_04_sfnt_off00012f79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F79 16112 bytes
SHA-256: c20296e0343c882b284c2ce760230514cdd94a54be6f0440818bb95ddeae0f7e

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