Malicious PDF — malware analysis report

Static analysis result for SHA-256 358217eef2aa9914…

MALICIOUS

PDF

75.5 KB Created: 2021-04-12 06:31:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 65c0748f9ea1cdac81c4da1412c104bc SHA-1: 2e79946424e397117dd7c660d102ead1876ce975 SHA-256: 358217eef2aa9914740d966e705e8bfa558b958af7f527822696a6421bf24802
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 0.9998

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 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://xajibur.ru/strik?utm_term=star+trek+movies+in+order+of+production PDF link annotation
    • http://gazedalepi.sportsontheweb.net/72321148118.pdfIn PDF document text
    • http://jerimujolegem.medianewsonline.com/carter_kane_and_percy_jackson.pdfIn PDF document text
    • https://mebifexet.weebly.com/uploads/1/3/1/3/131381374/fejerulelapejun-lerolusowonin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388163/normal_60634c0b19687.pdfIn PDF document text
    • https://nosekixiruwem.weebly.com/uploads/1/3/1/3/131380944/8774327.pdfIn PDF document text
    • http://duzixofiwisegi.mygamesonline.org/bezoxakofiwo.pdfIn PDF document text
    • https://tejojobowadame.weebly.com/uploads/1/3/0/8/130874570/2372062.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481275/normal_5fcae785dcfe5.pdfIn PDF document text
    • https://zulitaxovali.weebly.com/uploads/1/3/5/3/135351491/tinuginadezimap.pdfIn PDF document text
    • https://sejumajofejopib.weebly.com/uploads/1/3/2/7/132740214/korisuxuruv_bakopi.pdfIn PDF document text
    • http://zozamowewideno.mypressonline.com/90674181620.pdfIn PDF document text
    • https://vuriluwaloseg.weebly.com/uploads/1/3/4/4/134492921/musaje_mijos_fofemafemewuxav.pdfIn PDF document text
    • http://kekijojovif.sportsontheweb.net/emotional_intelligence_2.0_book.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/gumagabu/pugujomunofiwudijo.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/c_v_format_in_word.pdfIn PDF document text
    • http://tavamikilav.myartsonline.com/can_you_air_fry_potatoes_without_oil.pdfIn PDF document text
    • https://s3.amazonaws.com/zatasipezeg/1st_anniversary_images_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/scavenger_hunt_riddles_and_answers_for_adults.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/perforated_metal_sheet_cladding.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_off0000e9a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A6 5496 bytes
SHA-256: b950d3a915a1032c4bdcf6cd59f8489c190ee7a0038cfbba263a746d79fdb2e7
font_01_sfnt_off0000fc53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC53 10692 bytes
SHA-256: d5f295a356e76d0149d037b4daabb49496963123802f59989dee217fe72275f0

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