Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a1ee1a734030126…

MALICIOUS

PDF

78.3 KB Created: 2021-03-20 00:01:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 8c4be644acda775abadf27c47b0323fc SHA-1: da6678b73f53c817a9490e8afc397b7b11b7fa4d SHA-256: 0a1ee1a734030126b11c9ba3a12f03d38bc648e465676cfb1140a80bf1468220
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and numerous external URIs point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/wix?keyword=ideal+home+range+paper+plates PDF link annotation
    • https://cdn.sqhk.co/zolulesar/Rhgojdu/nopagi.pdfIn PDF document text
    • https://cdn.sqhk.co/liguvikozo/jhagg9o/anaphylactic_reaction_treatment.pdfIn PDF document text
    • http://xuxikurov.mygamesonline.org/medaregetixakewujom.pdfIn PDF document text
    • https://cdn.sqhk.co/gasubapo/g3ifApf/mivokexelewo.pdfIn PDF document text
    • http://jojazinex.mygamesonline.org/jabizunexuluvopuratow.pdfIn PDF document text
    • http://mebovedu.getenjoyment.net/76863453357.pdfIn PDF document text
    • https://cdn.sqhk.co/mepofazobi/hjYif59/eva_popiel_kid.pdfIn PDF document text
    • https://cdn.sqhk.co/xanuramalu/jdjihff/37457746844.pdfIn PDF document text
    • https://cdn.sqhk.co/vedasukuki/zhjqjcz/wrestling_revolution_3d_wwe_2k17_mod_apk_data.pdfIn PDF document text
    • https://cdn.sqhk.co/japewaturu/yJheiay/finezajigazuronadexanowi.pdfIn PDF document text
    • https://cdn.sqhk.co/minamojazi/jbggDhg/download_flickr_app_for_ipad.pdfIn PDF document text
    • https://cdn.sqhk.co/jekurona/gdjf0hc/3d_galaxy_map.pdfIn PDF document text
    • https://cdn.sqhk.co/jigitovewuk/bOIihN6/yellow_light_bulb_on_porch_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/pobijejok/VhiaCQp/517692002.pdfIn PDF document text
    • http://kovatafob.mypressonline.com/miragesewaz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2b12d24f-0c9a-4a32-b427-430aba395f0c.filesusr.com/ugd/6cfe90_3dd50de8f2864a90a0b5ce9f1e6ebae8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/cheap_android_9_tablet.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/61652307817.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/nara_japan_guide.pdfIn PDF document text
    • https://d8ec88ce-93b1-4b83-b294-7016fd5b5063.filesusr.com/ugd/366252_dd5bb89f4c9d4f86949b294662115c5b.pdf?index=trueIn PDF document text
    • https://0df22b04-17ae-4e65-9af8-3af4445b4601.filesusr.com/ugd/71fd01_d211591381b1458a874458536aec9e51.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD34 5308 bytes
SHA-256: 4dafe44b5fb041c551899599c80686cbeff1fd68f0dba82f10400ab00001b5ea
font_01_sfnt_off0000ef11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF11 11032 bytes
SHA-256: 6a9d998551cf1d4914e3eab3559a86ee62db08bf2a23172627f50135c6a2c033
font_02_sfnt_off00011526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11526 16140 bytes
SHA-256: 159427b32ed66bfbde86def5e6c2992bde67dfb25400c4000a37c9b59b949b61