Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b60ad464cd10cb1…

MALICIOUS

PDF

80.5 KB Created: 2021-03-28 19:28:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 7e029249cb63181bce787a0bd75102fa SHA-1: aff81ea8af2dd421e25a88d15e3087a82623b98e SHA-256: 8b60ad464cd10cb17e23a8f3eec6738393b662c1c6b632beb12d09e775aa0880
196 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 point to other PDFs, suggesting a link farm or SEO abuse tactic. The primary lure URL is `https://bologen.ru/strik?utm_term=the+neverending+story+book+common+sense+media`, which redirects to other PDF download locations. This behavior is indicative of phishing or malware distribution, likely delivered via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://bologen.ru/strik?utm_term=the+neverending+story+book+common+sense+media PDF link annotation
    • https://cdn.sqhk.co/dezorevukor/FNyjbih/download_street_wars_pvp.pdfIn PDF document text
    • https://cdn.sqhk.co/zezegawutogu/gchhpgi/36537825518.pdfIn PDF document text
    • https://cdn.sqhk.co/reretukida/ugdijib/cross_border_fee_schoolsfirst.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369508/normal_603d225883fd9.pdfIn PDF document text
    • https://pexasojurez.weebly.com/uploads/1/3/1/3/131381046/basoma.pdfIn PDF document text
    • https://cdn.sqhk.co/zofizitene/yO4KYib/nhl_news_bruins.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393044/normal_5fce96d49e1e0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416490/normal_5ff45e8b00044.pdfIn PDF document text
    • https://tinonerapize.weebly.com/uploads/1/3/5/3/135349756/5520980.pdfIn PDF document text
    • https://cdn.sqhk.co/kifateten/aOUp3gk/vr_lens_protector.pdfIn PDF document text
    • https://tilijaxak.weebly.com/uploads/1/3/1/3/131381787/jevakisar.pdfIn PDF document text
    • https://nebolizeluxofid.weebly.com/uploads/1/3/0/8/130874408/xatoziraganetivatuf.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/dobesogum/line_6_fbv_shortboard_mkii_looper.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/for_honor_kensei_rework_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/information_of_albert_einstein_in_marathi.pdfIn PDF document text
    • https://s3.amazonaws.com/filidabut/diborozibozej.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/66463181420.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/change_of_house_ownership_form.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/18858820686.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/22472730790.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/what_time_did_the_stock_exchange_close_today.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/52473072087.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/factoring_difference_of_squares_and_perfect_square_trinomials_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/mipixulamudajixubov.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/free_website_templates_html_css_javascript.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD4 5424 bytes
SHA-256: 621ee2f3a5589a5b19b26ff1d11154856711bc2a477d08ef81439074bdaef146
font_01_sfnt_off0000fe1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE1C 11724 bytes
SHA-256: 95c6a42abb95359e517b6a6a2d5f7e8ff741b98c94e28b0eecd01c6b7535d70e
font_02_sfnt_off00012453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12453 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333