Malicious PDF — malware analysis report

Static analysis result for SHA-256 df51d7fa8e422616…

MALICIOUS

PDF

79.2 KB Created: 2021-06-01 05:00:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: e0571d9dc37b1f4545c8d6126f70ccb6 SHA-1: e9a38e2efee1ffeac1db8cbab79925b4a3a68236 SHA-256: df51d7fa8e422616c4ea651fccb48ee5069052f3f44a8c76a41d40160483230d
164 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains an external URI pointing to a suspicious domain, likely part of a phishing campaign. The document body, though heavily obfuscated, suggests a lure related to social media content, aiming to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://allytemp.ru/pbw?utm_term=m+love+s+whatsapp+status+video+download+sharechat+tamil PDF link annotation
    • https://pugubitef.weebly.com/uploads/1/3/5/3/135302221/rimolagemikoko.pdfIn PDF document text
    • https://woninulanomawij.weebly.com/uploads/1/3/4/6/134670754/leledobivupawufi.pdfIn PDF document text
    • https://pemolopudamas.weebly.com/uploads/1/3/4/7/134753943/vibisumasitevebu.pdfIn PDF document text
    • https://jaxedafotonomut.weebly.com/uploads/1/3/4/8/134885779/gefesojejokeju.pdfIn PDF document text
    • https://wojatobarub.weebly.com/uploads/1/3/4/6/134612389/diverizukiwebeke.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff123781-283c-4d83-bedc-27194597c5d4/62552380389.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98e13516-e067-4367-8009-39a7e4531426/crime_rate_graph_nyc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4400fe87-8483-41fe-897b-bab6c42c036a/rascal_600_scooter_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57a18879-c9b1-4700-af78-4d889f79cbcc/nigukuxokiri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e441167f-2b1a-42f7-8c6f-9621859b2141/who_is_the_richest_billionaires_in_the_whole_world.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cc1b2da-d574-4c72-b692-4a68070b5c98/tazoru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/beea806b-9ead-46b1-a8eb-cb5494e62a4f/why_is_my_ps3_controller_blinking_red.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae373938-b13c-41bc-b184-c8a49df031e6/galezadi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0baf9584-d3b2-4da1-80df-bc7dcae1c33c/what_does_culture_mean_to_you_in_the_workplace.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/370ee108-2832-4e39-8750-52b4a41cb6fa/do_you_hear_what_i_hear_noel_regney_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56bd5779-354f-491f-9e2a-fa1962d4ffeb/tipomov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1d087ec-13be-47ba-a3c8-524bca32fbfa/dozisuwaxaduto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92cc2914-27c7-4741-ae4b-52b5b442f6fb/50647241255.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d0cdc0d-d519-43bd-b0b3-142ea4a6e2f9/testo_550_resetleme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a5fb694-baed-4f1c-b000-9b6e7261e3c9/what_is_the_probability_formula_for_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0561a43d-3d98-4e6f-b725-ed32fc2e26c0/how_to_filter_oil_in_deep_fryer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35e4c4b6-42cb-4252-b276-6e73fe5c211e/36693010087.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16747781-4d5c-46ee-935f-ebc306e229a8/29950008987.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62ceccec-7cd4-44e5-abca-d8119f4c8a19/kingdom_woman_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a316309-f3ce-4ced-bcb2-6fa12c5e2166/83665021949.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_off0000dcd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD4 5468 bytes
SHA-256: 607fbca994008e2aa07ccea9fe31330d7d87a3c27a3513b7b0eb7e1536537960
font_01_sfnt_off0000ef66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF66 12756 bytes
SHA-256: 1ba2401f25984057ef02b98911802969fc918bd061be36409687c58c3c5a0426
font_02_sfnt_off00011950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11950 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

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