Malicious PDF — malware analysis report

Static analysis result for SHA-256 d99e68317e126a7a…

MALICIOUS

PDF

79.9 KB Created: 2021-03-21 11:16:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 39c9e8736d9a024d977a2a075331092a SHA-1: 1aa7d7088bf8be040e97d9d0cd2d0a83c4641f12 SHA-256: d99e68317e126a7a23dfb3366c3800c9e17f03068cab011c65eba364a4893d49
156 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 0.9998

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://baarspo.ru/wix?keyword=the+gregg+reference+manual+latest+edition PDF link annotation
    • http://itayoga.space/jarijinotopefatamegel3bgdg.pdfIn PDF document text
    • https://mepovokure.weebly.com/uploads/1/3/0/9/130969824/newuv.pdfIn PDF document text
    • http://chestlune.online/hoja_semilogaritmica_de_3_ciclos064ec.pdfIn PDF document text
    • http://vkysnaya-eda.site/tinabodunebycqn.pdfIn PDF document text
    • http://venira.su/how_to_install_electric_hot_water_heater_expansion_tank0bkau.pdfIn PDF document text
    • http://cosmosqrab.online/anthony_de_mello_awareness_book7c5lh.pdfIn PDF document text
    • https://wakukaxowemaba.weebly.com/uploads/1/3/5/3/135303752/b79778470549fd6.pdfIn PDF document text
    • http://generalmassage.online/fimakarabemivaziriredltts.pdfIn PDF document text
    • http://axecheat9.xyz/see_you_again_sheet_music_with_letteolx0k.pdfIn PDF document text
    • http://parkingtest.xyz/mandalorian_who_is_the_actor14vd8.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/mefovu/24306710606.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/wugobidow.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/lotro_essence_crafting_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/why_is_my_freezer_not_cold_enough.pdfIn PDF document text
    • https://s3.amazonaws.com/panokojol/greased_lightning_sheet_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/45080994915.pdfIn PDF document text
    • http://bitezopunofiwu.rf.gd/pediatric_cpr_guidelines_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/89330029699.pdfIn PDF document text
    • http://gevekesudizare.epizy.com/meme_meme_yadavulam_audio_song.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF733 5384 bytes
SHA-256: ee0a8e3e79db7d3f3528a9c886b525736261cf2cb10d1be8c60872a67338b26f
font_01_sfnt_off00010955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10955 11628 bytes
SHA-256: e63b89b67df674db1c6942fe92d44a3b7eb76e6499b64ae6a47696b5007d3112