Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0fc7d91f55a6232…

MALICIOUS

PDF

91.8 KB Created: 2021-05-19 19:45:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0907ef6aad9aa1385d2769809e579486 SHA-1: 70fd53be0ee8073db88aae6d492ce47549efd46d SHA-256: d0fc7d91f55a62325e827a7bba49b3db18738d8d222827c00a874806d5f10edf
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 0.9990

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://baarspo.ru/strik?utm_term=how+to+get+amazon+quiz+prizes PDF link annotation
    • https://luboguti.weebly.com/uploads/1/3/0/7/130739177/vidawebib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369520/normal_6055338a423ee.pdfIn PDF document text
    • https://fanuxerejupu.weebly.com/uploads/1/3/1/3/131398214/856309.pdfIn PDF document text
    • https://fudesatalaponu.weebly.com/uploads/1/3/2/7/132710537/lusafaxil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458125/normal_5fcc54f2f0271.pdfIn PDF document text
    • https://nixuxani.weebly.com/uploads/1/3/4/4/134433038/zidobupotemepo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413375/normal_60446fa6a9ae0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497687/normal_5fffb5d63285c.pdfIn PDF document text
    • https://fiwirilo.weebly.com/uploads/1/3/4/0/134096979/e4f7a4.pdfIn PDF document text
    • https://pisilobeko.weebly.com/uploads/1/3/4/7/134728547/retuwubajato.pdfIn PDF document text
    • https://tagipuzato.weebly.com/uploads/1/3/0/7/130776724/16569e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367300/normal_605d8c3ddb80b.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/begijufadi/94346576224.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/happy_birthday_song_in_german.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/battery_charge_indicator_apps_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07e7c069-dd01-4a61-8316-bf057b4de5b4/femigiz.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/corsair_k95_rgb_platinum_cherry_mx_brown_qwerty.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/19524158497.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/xofunaxili.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/bbc_iplayer_radio_failed_iphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3bbab68-5c6c-4adb-b28e-96aa0b81a6e0/vermont_castings_resolute_acclaim_wood_stove_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/47487682233.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e44f1a0-dea3-4321-9bad-3a747be5f869/xoridifi.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_off000111f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111F0 5336 bytes
SHA-256: 88382242f999b8c08bc0f84e97da790ff6d9edc037f82b80e5a25b38d1587b7a
font_01_sfnt_off0001241d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1241D 11308 bytes
SHA-256: a2e0891d90608de9494cfc526943632d7e4ca2713b176b84262be22f9f4c502e
font_02_sfnt_off00014acb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14ACB 16164 bytes
SHA-256: ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8

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