Malicious PDF — malware analysis report

Static analysis result for SHA-256 de6b698d53504a08…

MALICIOUS

PDF

72.9 KB Created: 2021-02-02 11:51:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 5ef8eea12da69f3f3315e57801cc5e8b SHA-1: 1000b87d6e9af6aaeed5920a91c53e3f6a2ddfa5 SHA-256: de6b698d53504a084020c3f668c90ce77e1299a9ec111e0206554f327fd67907
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spamming operation. The primary URL, 'https://jottigo.ru/aws?utm_term=unscramble+words+with+answers', indicates a lure related to word unscrambling, likely a pretext for directing users to malicious or phishing content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jottigo.ru/aws?utm_term=unscramble+words+with+answers PDF link annotation
    • https://cdn.sqhk.co/gaxokakijefe/0GZpigy/cnc_machinist_salary_ohio.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486763/normal_5feea22b99664.pdfIn PDF document text
    • https://cdn.sqhk.co/kewesowovim/7giyTVX/the_realreal_store_chicago.pdfIn PDF document text
    • https://cdn.sqhk.co/jomububorava/ZheSchc/nevakebugetukororodav.pdfIn PDF document text
    • http://bapupozizevose.22web.org/rubber_sheet_drying_machine.pdfIn PDF document text
    • https://jutoxanifi.weebly.com/uploads/1/3/5/3/135321179/3304753.pdfIn PDF document text
    • https://xivenisulebitok.weebly.com/uploads/1/3/1/3/131378814/5794c467.pdfIn PDF document text
    • https://cdn.sqhk.co/tevosenijosu/jtKVha3/star_wars_the_old_republic_2_cheats.pdfIn PDF document text
    • https://larulesa.weebly.com/uploads/1/3/4/7/134717423/saberevo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388165/normal_5fd0b86333c6c.pdfIn PDF document text
    • https://cdn.sqhk.co/nalujujoso/jhdjbid/jevujamojorud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390350/normal_5fe8bd897b951.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kutoduno.rf.gd/chrome_os_for_windows_7_free.pdfIn PDF document text
    • http://fugewad.rf.gd/lego_movie_2_minifigures_rarity_guide.pdfIn PDF document text
    • http://kekunulu.epizy.com/6100954082.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/google_maps_android_no_street_view.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/28244599589.pdfIn PDF document text
    • https://s3.amazonaws.com/fadobirak/53957432739.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/top_animation_software_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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e03b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE03B 5404 bytes
SHA-256: 7b0724c50eb0fff454600f5cdbb2bf039f3f03efe63965a20b632bd2a34f5b06
font_01_sfnt_off0000f281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF281 10456 bytes
SHA-256: dc045d83b31ee9dca3ce4e63027c864cb31295cb48b6e59b6a4e766a8455383a

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