Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0440fafb719d0d0…

MALICIOUS

PDF

91.8 KB Created: 2021-03-19 13:01:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0d825eb204d2ef8dfe9def5c1f29429a SHA-1: dea5c81220a28e20f6bcfc04305e43f69c397993 SHA-256: c0440fafb719d0d0d96426894cd6cd55cd5bffa1337aa809ead2ff560498a6ab
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 0.9993

Heuristics 5

  • 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.
  • 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://jacksth.ru/strik?utm_term=pentair+easytouch+pl4%252Fpsl4+control+system+manual PDF link annotation
    • https://fijomenameti.weebly.com/uploads/1/3/0/8/130874411/8613ba55a5262.pdfIn PDF document text
    • https://gifukupuwabe.weebly.com/uploads/1/3/0/7/130775529/zotok-godejotozoliwo-fudidawimowuza.pdfIn PDF document text
    • https://levarimabogi.weebly.com/uploads/1/3/5/3/135328943/jokodirexip.pdfIn PDF document text
    • https://wepejusekubikur.weebly.com/uploads/1/3/4/4/134441987/b11ed.pdfIn PDF document text
    • https://xagigerabep.weebly.com/uploads/1/3/1/4/131483632/ed6406c67.pdfIn PDF document text
    • https://zufulakoloti.weebly.com/uploads/1/3/5/3/135301661/pufibodukop.pdfIn PDF document text
    • https://lojefumelo.weebly.com/uploads/1/3/0/8/130814401/b397a6d7f8.pdfIn PDF document text
    • https://koredude.weebly.com/uploads/1/3/1/4/131406285/wavok_walofam.pdfIn PDF document text
    • https://nonelugo.weebly.com/uploads/1/3/0/7/130775267/e22f278c2c0c.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/budovewesekaz/bsplayer_free_android_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/kovafulipilazukizinubop.pdfIn PDF document text
    • https://6f12065f-c45d-410c-b048-6ec23fb2b810.filesusr.com/ugd/02ccf7_e59b46f95bd1489e8f6cd3ec28b2c5e9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/intellij_format_code_line_length.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/wuguboragoxumapafidefamup.pdfIn PDF document text
    • https://ba85394b-11ac-4ca4-926b-74ca936c52e1.filesusr.com/ugd/5ccfc8_36d6ae6653bb48f0b3f3c5b79782ef4e.pdf?index=trueIn PDF document text
    • https://f421159b-d329-41e8-bc42-072bc93e4c50.filesusr.com/ugd/65d6f7_d425c6ad7c82499ebd8e74c7c372c8ba.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jivuxo/paxumimuvutoxed.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/amazon_prime_video_won_t_play.pdfIn PDF document text
    • https://6bc553e5-d0de-4278-827a-c77c8eb32fbd.filesusr.com/ugd/4a6c57_08c4a7aa168449b68b033453f0537d88.pdf?index=trueIn PDF document text
    • https://a40b6db0-1679-4e03-879f-ac5827b9aa7d.filesusr.com/ugd/dba42a_6580302bc38248279ef28f6fb7ef7f37.pdf?index=trueIn PDF document text
    • https://e4da1597-3bb3-488b-9226-7c2c9e06e9ce.filesusr.com/ugd/db5d73_cd3aed55977140dd9943fcf1fddf14b3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/pulabofividefukanomofak.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_off00011cbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CBB 2184 bytes
SHA-256: bb63fed05d034e23a20afda09a111598e33b81c6a837396f95ff9dcbb5c699b2
font_01_sfnt_off000126f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126F4 5400 bytes
SHA-256: 683d2c5d38fe9d2de15221372bbbefe97ffeef4a4620880e8ea89142c69686c5
font_02_sfnt_off00013942.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13942 11628 bytes
SHA-256: 18ff322d3be69a5268ed1d55cffdad8a4d77bbf18c6162ded8e6c963eb12da13

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