Malicious PDF — malware analysis report

Static analysis result for SHA-256 1db36bcaf993af1c…

MALICIOUS

PDF

89.6 KB Created: 2021-03-14 18:27:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 2a5c2ba2928452fb734a4c7c8bcb63aa SHA-1: 2b81961b7b8c2ed4391e7e0a900ad7f3b8bb2608 SHA-256: 1db36bcaf993af1c52ae2a6e2e389d726a401edc35850a077a7968a9c5baac7f
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. The primary lure involves an image linking to an SEO redirector, which ultimately directs to the URL https://resalured.ru/wix?keyword=a+story+is+sammy+alive+answers. This suggests a phishing attack aiming to trick users into visiting a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://resalured.ru/wix?keyword=a+story+is+sammy+alive+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4494669/normal_603e2f33341ba.pdfIn PDF document text
    • https://lotunesu.weebly.com/uploads/1/3/0/9/130969364/bavat.pdfIn PDF document text
    • https://guparamoribum.weebly.com/uploads/1/3/2/7/132711937/zosufaw_masoneritusuwan_tosudutawidixi_puzebokidozenum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413865/normal_5fe6f5a14e640.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457281/normal_600a3c649d3d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486033/normal_60046e46d7b13.pdfIn PDF document text
    • https://sibikobibe.weebly.com/uploads/1/3/4/0/134040949/pevubotu.pdfIn PDF document text
    • http://malalij.iblogger.org/77336790875.pdfIn PDF document text
    • https://fegajasun.weebly.com/uploads/1/3/4/5/134502742/mibebujitivo.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/rawesaragegugar/mamijupidubenemuratetul.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/dungeons_and_dragons_starter_set_character_sheet.pdfIn PDF document text
    • http://difugarulid.epizy.com/xirozu.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/9847156460.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/226d55dc-cdcb-479c-87b7-9b99f08053fb/mobius_action_cam_settings.pdfIn PDF document text
    • https://cbb9655c-b60d-4095-8c1c-bb5f9a2903c5.filesusr.com/ugd/4dd980_7fc3144d37b44b6fba2f7730749a0fd8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a02bc8d0-40f3-40ac-bc62-d557c90044a4/painting_kitchen_cabinets_white.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6910146-a2ff-4d40-b844-e85390e61e1c/zapometajotemuripabijabi.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/33709392434.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/532fe801-3707-4d6a-b19b-3d31ab178cb0/dokuvesopazakatebu.pdfIn PDF document text
    • https://22e365c6-0853-42e1-82f8-83473bf9c0bf.filesusr.com/ugd/217d68_54b50ed6068f4508a095374f9af1a010.pdf?index=trueIn PDF document text
    • http://pajamubo.rf.gd/24558295171.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12146 5076 bytes
SHA-256: aa13708f6444fd56225b3077f22ce1645a38071945d333e674dda4e3c62b27a6
font_01_sfnt_off0001328b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1328B 11436 bytes
SHA-256: b21779e7d3b17fe395708144a21592b64ab189ca331411a0859aff9dd6de4489

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