Malicious PDF — malware analysis report

Static analysis result for SHA-256 39f6f9c97ee1d027…

MALICIOUS

PDF

70.6 KB Created: 2021-04-26 18:59:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 415d4ac616eee96204606eb6fc4f2d14 SHA-1: 7146c4be03440d09ff1da8dcf42432a3727cb1c5 SHA-256: 39f6f9c97ee1d027a26dec7e355f58e837130106629183c1b3b442c126ab62be
186 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 0.9996

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.
  • 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://gimoguvi.ru/strik?utm_term=evenflo+chase+lx+manual PDF link annotation
    • https://watuluvijigu.weebly.com/uploads/1/3/3/9/133997483/bibotikavudidi.pdfIn PDF document text
    • https://wotujajatedigi.weebly.com/uploads/1/3/5/2/135295120/diwogesivigisukebo.pdfIn PDF document text
    • https://cdn.sqhk.co/jowapezo/yhaijzU/miranapigajujanuzig.pdfIn PDF document text
    • https://lemabifi.weebly.com/uploads/1/3/4/3/134319461/6eb00d823ef33d6.pdfIn PDF document text
    • https://cdn.sqhk.co/nivavepe/ehjeUie/nonstop_balls_hack.pdfIn PDF document text
    • https://cdn.sqhk.co/dedikifefisu/hh1ibBd/pafosatazemotiniju.pdfIn PDF document text
    • https://cdn.sqhk.co/tefazaturar/iRvjhIh/65019401371.pdfIn PDF document text
    • https://cdn.sqhk.co/zubuwebofe/d8giyhc/1000_oldies_spain.pdfIn PDF document text
    • https://mututekabifu.weebly.com/uploads/1/3/4/4/134466573/somirataxomev.pdfIn PDF document text
    • https://cdn.sqhk.co/pitekofotada/iijgjjJ/barber_hair_salon_hair_styling_games_3d_online.pdfIn PDF document text
    • https://cdn.sqhk.co/muvotugi/hfUhjie/texonakijopelef.pdfIn PDF document text
    • https://motutipe.weebly.com/uploads/1/3/4/6/134674000/kugopajuxigol-dejado-bisekesu-jatanirila.pdfIn PDF document text
    • https://dagaroxir.weebly.com/uploads/1/3/5/9/135973008/f933f.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/desekusoxi/159933407.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/is_inventories_included_in_balance_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afa9a112-467e-4793-9f11-24d91399f95f/where_is_the_memory_card_on_ps_vita.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a7bd6c8-5b5d-4b8f-8cf2-83221375c49b/gusumedipoxumu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cceaf60-5277-4400-af5a-31f8303a8251/jlab_wireless_earbuds_volume_control.pdfIn PDF document text
    • https://s3.amazonaws.com/dopugaxelelema/godep.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/zapadovokinorobu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37f6a15c-fa57-4c6a-b11e-10aeeca0b75e/bogosagex.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/fisher_price_toys_for_2_year_olds.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_off0000d59c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD59C 5108 bytes
SHA-256: 481ec59ba948b5cfdd2a466eb7741af4afcc4045c915631d8b6150b8b40da824
font_01_sfnt_off0000e6ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6EE 10820 bytes
SHA-256: 867c148b01b5d49b604abfaf58e8b9ebd42706ba7832260d0087d3468e615b9c

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