Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6fcde18c5fc7d14…

MALICIOUS

PDF

86.4 KB Created: 2021-03-11 08:07:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3aaf877e36fffbac687e71a1ec44a4b0 SHA-1: e188a02aa71c682808d582a7228006038457f3f2 SHA-256: f6fcde18c5fc7d14ee03ca2690ce0e8a1c91974acf96d8a1ae33d2865110ef01
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9991

Heuristics 5

  • 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.
  • 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/123?utm_term=how+to++issuu+pdf+on+ipad PDF link annotation
    • http://siwosupegejolop.medianewsonline.com/how_do_i_fix_incompatible_hp_ink_cartridges.pdfIn PDF document text
    • http://koprovk.xyz/how_to_make_spy_camera_at_homeckzmk.pdfIn PDF document text
    • http://zoo-taxi.site/5633810935k8gz7.pdfIn PDF document text
    • http://kadaxejob.mypressonline.com/dodisixojuleb.pdfIn PDF document text
    • https://sabalijazot.weebly.com/uploads/1/3/2/6/132695986/sazasebamafijorakiwe.pdfIn PDF document text
    • http://xufopizaxeto.medianewsonline.com/turipabokuz.pdfIn PDF document text
    • https://rebopugosoge.weebly.com/uploads/1/3/5/3/135346619/28c9a6ae1f69c.pdfIn PDF document text
    • http://mutujejeturuduf.medianewsonline.com/lalovapotebedipilan.pdfIn PDF document text
    • https://salupoxegiras.weebly.com/uploads/1/3/5/9/135961269/setilexivotise.pdfIn PDF document text
    • https://mudobimug.weebly.com/uploads/1/3/4/8/134853100/zopitumiguzi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/resisuna/agatha_christie_book_collection.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/pros_and_cons_of_studying_abroad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf729b5c-f051-47d1-af12-ac946a88fad7/rinnai_rur98i_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff9e98b1-7e57-43dd-87ed-2ae4a5082342/21476087617.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/fake_call_application_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/uncharted_the_lost_legacy_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/14194190981.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cf379d3-0e69-491e-9785-b2658c7fa84d/jotafu.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/74488017485.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/tibobaseteguwebukuvoxu.pdfIn PDF document text
    • http://nitubak.atwebpages.com/45175335924.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dc5c865-bf49-40cc-8e12-f4ef072d7b3a/putezekud.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/boyce_codd_normal_form.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
    • 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_off0000feb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB2 4960 bytes
SHA-256: 298a74c4a1036928cc723a799225ed4a1383846dca79b71095149b9a3d616ddc
font_01_sfnt_off00010fba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FBA 11540 bytes
SHA-256: fb10588d83071e554a00b6c23a6a5ae43cb3ba71a1d83e16a1aeddb5eee2fbd7
font_02_sfnt_off00013726.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13726 16076 bytes
SHA-256: 9352d416d3fc38e0cde715a6fbdb9492e961298b7af78ef2a950ce7bf6ec641e

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