Malicious PDF — malware analysis report

Static analysis result for SHA-256 f053c77e90515d4f…

MALICIOUS

PDF

77.3 KB Created: 2021-03-31 02:25:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b2702544bf72d6e4af7575ccf6c0bc1c SHA-1: 93df5fec70c5b803b0a9b3a2daae65fc3c606722 SHA-256: f053c77e90515d4f842ad3eef847585af1dd54f503518eda894e3ddd86ed08fb
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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 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://fokemale.ru/123?utm_term=utopia+origin+hearth+guide PDF link annotation
    • https://cdn.sqhk.co/zonurubo/gXdaPeN/kinakomubuv.pdfIn PDF document text
    • http://devivitonewe.sportsontheweb.net/58450918446.pdfIn PDF document text
    • http://bupomorefa.22web.org/pascal_wager_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/foroboreb/ijSAgil/94663531788.pdfIn PDF document text
    • http://nitafibejuze.mygamesonline.org/vezunizukafopeduniwa.pdfIn PDF document text
    • https://cdn.sqhk.co/mukutosi/idbN7gg/college_hockey_stats_2019.pdfIn PDF document text
    • http://custits.space/vinetizurasuvugatopadx9nq9.pdfIn PDF document text
    • http://bettermoneytips.com/bed_set_twin_sheetsy31jk.pdfIn PDF document text
    • https://cdn.sqhk.co/senepaderu/c1ogcij/5_below_bugha_headset.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pafexegud/88477549764.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/61445983345.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fea4a493-0e0e-407e-97cf-4b9a89c74798/stihl_fs_56_rc_line_length.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/fekitolon.pdfIn PDF document text
    • http://nolusiwafaki.epizy.com/jadawewa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77215121-3f97-4f8c-9bfd-35f7a769e582/how_to_start_a_countyline_wood_splitter.pdfIn PDF document text
    • http://nolewepanuvaxup.epizy.com/is_there_going_to_be_a_season_3_of_discovery_of_witches.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/598acdf9-8e73-40e5-b103-556512879d83/read_four_a_divergent_collection_online_free.pdfIn PDF document text
    • http://lifised.epizy.com/41071599188.pdfIn PDF document text
    • http://wikukodukoja.onlinewebshop.net/kopogurebutate.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_off0000e4f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F7 4884 bytes
SHA-256: 6592f5781ffab3769ae9b6ce8e9ed0797e1089c48f2c960c90e73f8324da092d
font_01_sfnt_off0000f57d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57D 10772 bytes
SHA-256: 5759e3c2a5e98e2e968214ac16d2bbd93571ce683c4da78f195d930e838fca1b
font_02_sfnt_off00011a40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A40 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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