Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8609a4815ee92b2…

MALICIOUS

PDF

88.0 KB Created: 2021-03-24 20:48:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f65d45d0c1fd3911b78276722fdb88e SHA-1: 28ab4e1bc211ec30c3641f310154e92ceef3ede6 SHA-256: e8609a4815ee92b2f399d7a34d6789240780ee6172972c36c111a8b4ab2d34e1
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV also flagged this file as malicious, suggesting a phishing or malicious content distribution intent. While no scripts were explicitly extracted, the presence of numerous external URIs points towards an attempt to redirect the user to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://botokaw.ru/strik?utm_term=the+girl+with+the+dragon+tattoo+series+author
    • http://top-shop-store.website/belvia_shorts_size_guideqajao.pdf
    • https://cdn.sqhk.co/sexuzoropa/NjihcMf/navorabepogavu.pdf
    • https://cdn.sqhk.co/nopawuwam/bTkjjgf/45928656437.pdf
    • https://cdn.sqhk.co/tawumemikuva/idu8icw/79649122065.pdf
    • https://cdn.sqhk.co/nevupediwix/hghejah/digimon_xros_wars_episode_1_online.pdf
    • https://cdn.sqhk.co/saturarad/Cggidid/tijavak.pdf
    • http://kedozupo.iblogger.org/segamilifisomawos.pdf
    • http://ig-socialmedia.xyz/rudoxaxivitrll35.pdf
    • http://wivejudotimog.22web.org/luritixovoxodojufevi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lixoxomowaxane.epizy.com/latin_american_history_textbook.pdf
    • https://s3.amazonaws.com/salade/workbook_add_worksheet_vba.pdf
    • http://dosujag.rf.gd/66454031378.pdf
    • https://s3.amazonaws.com/bokelur/90226689974.pdf
    • https://47e4df30-8702-49a4-8bd5-327e1546ff06.filesusr.com/ugd/379272_18f2e063f4eb410fb599b1928cac890a.pdf?index=true
    • https://551f0ad2-75d1-4009-b90b-2f3e3e20230b.filesusr.com/ugd/c2bf0a_b6fd61d2b738444782696379d494ea5e.pdf?index=true
    • https://s3.amazonaws.com/xuvamuba/how_to_get_adopted_birth_certificate.pdf
    • https://9e730ba1-499c-413e-9a09-8a81f8121270.filesusr.com/ugd/0a0016_6f141a899dfb493a8da88979670ae15b.pdf?index=true
    • https://3568ea06-17fa-4787-91ae-86b9aa918cbd.filesusr.com/ugd/8ade13_16ef6007330a4021ba0ad57046241b2e.pdf?index=true
    • https://123949be-7110-4ba3-a240-a7df06fb38ce.filesusr.com/ugd/80fd5d_55ddee67fb6542f496d25d4c6922df6a.pdf?index=true
    • https://s3.amazonaws.com/nodetuxapabara/classic_hunter_bis_spreadsheet.pdf
    • https://170a7d3c-74f0-42f5-9ead-98ae292a4922.filesusr.com/ugd/a18aa6_933df27a2b554160bc67d9500343a5dd.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001193f.bin
f3b11386e5f5eeb44fb1394cf42824ae877d9442385d999a9f0c9225545a6995		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1193F 5128 bytes
font_01_sfnt_off00012abc.bin
38b9e5d116d6857a116bd53b2863d262736f84e3afded0f3352d605324709a2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12ABC 12688 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.