Malicious PDF — malware analysis report

Static analysis result for SHA-256 68e386dad341ba96…

MALICIOUS

PDF

83.0 KB Created: 2021-03-12 06:27:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 794ae0fdb562c2f186a153eead752e8e SHA-1: 6c3c295d656d5684296104a4c787e4eaa2ed80fa SHA-256: 68e386dad341ba96eb4325a7ab26004f4547569644e9b42bf6d48372b22f4efb
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically mentioning 'employment background check in spanish', suggesting a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with a phishing campaign designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://vilenefex.ru/wix?keyword=employment+background+check+in+spanish PDF link annotation
    • http://tulomodev.getenjoyment.net/how_to_adjust_noise_cancelling_on_beats_studio_3.pdfIn PDF document text
    • http://vostokzapad.su/what_is_the_future_of_uspsbioyk.pdfIn PDF document text
    • http://lynciguest.com/90963883124y9vff.pdfIn PDF document text
    • http://famozosivupiwij.sportsontheweb.net/nakebuxemugago.pdfIn PDF document text
    • http://fidekeleko.medianewsonline.com/livre_apprendre_japonais.pdfIn PDF document text
    • http://itprod.space/sebik51xuh.pdfIn PDF document text
    • http://jomikifu.medianewsonline.com/principles_of_microeconomics_9th_edition_isbn.pdfIn PDF document text
    • http://xepuxesadara.mypressonline.com/83774115645.pdfIn PDF document text
    • http://ruwosiju.getenjoyment.net/ligonuluw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c46c713f-5e69-4c64-aad4-d86f29440f76.filesusr.com/ugd/957c7b_9fd7d207eaa44db49d18fde831bc7f7e.pdf?index=trueIn PDF document text
    • http://robibedoramate.rf.gd/14910310125.pdfIn PDF document text
    • https://40fd9d30-e691-4ad4-9ff9-7de67b304886.filesusr.com/ugd/45b27a_0d5a8b8985ed412ea629e0ff8311c98a.pdf?index=trueIn PDF document text
    • http://kepofif.onlinewebshop.net/70881459371.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/spotify_premium_mod_apk_latest.pdfIn PDF document text
    • https://06ebba1c-c738-45d4-b58d-83edbdcc9420.filesusr.com/ugd/b14caa_b04d5555b226486f876fcab1742bdef8.pdf?index=trueIn PDF document text
    • http://ximuxulizi.myartsonline.com/89095690999.pdfIn PDF document text
    • http://nuloporime.rf.gd/free_english_tagalog_dictionary_for_android.pdfIn PDF document text
    • https://50bf384a-eeac-4f26-a262-e2ba1a5e00ba.filesusr.com/ugd/17159d_bbbe05a4baf5485e85bb8a06fb7f1af6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/jofubilelixobifololawopa.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_off0000ef36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF36 5748 bytes
SHA-256: 655e79d74b0a718a5c2f86cebe613853647741e341b3700c23d8b30ecb4cd3b4
font_01_sfnt_off000102a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A3 11628 bytes
SHA-256: 7810699a4b13495cfba0c12bc4f433c9b4582cda2a1a3005dca9e3af6d3a4cc3
font_02_sfnt_off000129e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129E7 16068 bytes
SHA-256: bd4ec210b6f0bed3603b49d512cd9a08d3e9d1e81fcf206800274a46106400dd

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