Malicious PDF — malware analysis report

Static analysis result for SHA-256 a10e7231f84c3bd7…

MALICIOUS

PDF

79.1 KB Created: 2021-03-16 13:10:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 8884803aff4b571910f77d3cc6c87771 SHA-1: ba67974746f813477e78728f49b54e345ffe79fb SHA-256: a10e7231f84c3bd76b03fa7ede9d4f1e82a19f55c99b8f9f311898bd2b7355ac
196 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier. It contains a large number of external links, many pointing to PDFs hosted on cloud storage or personal websites, suggesting a link farm or SEO poisoning tactic. The primary redirector URL, 'https://soxebez.ru/strik?utm_term=data+warehouse+vs+database+tabular+form', is likely used to funnel users to malicious content, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.
  • 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://soxebez.ru/strik?utm_term=data+warehouse+vs+database+tabular+form PDF link annotation
    • https://sadewirezetif.weebly.com/uploads/1/3/4/3/134318623/dufizimaf.pdfIn PDF document text
    • https://rajilogibakew.weebly.com/uploads/1/3/5/3/135326989/nudavunesuzab-vekigak.pdfIn PDF document text
    • https://werukubafufu.weebly.com/uploads/1/3/4/0/134000234/351982db4.pdfIn PDF document text
    • https://vakikuxikedeti.weebly.com/uploads/1/3/5/3/135320305/7116892.pdfIn PDF document text
    • http://repair-foto.ru/ge_electric_steam_clean_oven_instructionsxk7z4.pdfIn PDF document text
    • https://kurisakon.weebly.com/uploads/1/3/4/5/134504438/rubexozobisenirer.pdfIn PDF document text
    • http://koolmaxt.online/boss_punch_polo_shirturdgj.pdfIn PDF document text
    • http://safijejog.mygamesonline.org/help_beatles_tab.pdfIn PDF document text
    • https://zukixemafeka.weebly.com/uploads/1/3/1/3/131398149/jusezokovowudemajike.pdfIn PDF document text
    • http://pazadixokumox.sportsontheweb.net/suncast_hosemobile_garden_hose_reel_cart.pdfIn PDF document text
    • http://lorakuze.sportsontheweb.net/can_a_kindle_fire_battery_be_replaced.pdfIn PDF document text
    • http://9gusevshop.space/86538717306zyry2.pdfIn PDF document text
    • http://prodit.space/89689816320rj8wm.pdfIn PDF document text
    • https://nepuvojikonutoz.weebly.com/uploads/1/3/4/6/134677469/lozogawi-depejixaputopiv-guboboruwamasus.pdfIn PDF document text
    • https://nanejebowobo.weebly.com/uploads/1/3/1/1/131163631/2dad8eb65c99.pdfIn PDF document text
    • http://edapog.online/adobe_reader_for_apple_ipadyuxhz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jawusawar/vosemiboxuru.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/ronetorakar.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/samsung_hw-j355_price.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/3704488630.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/oxford_english_dictionary_advanced_learners_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/rorejavofarovewotipepuk.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/nenel.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA38 5168 bytes
SHA-256: f5ba80e22e91d2d0ae793c302e6010c4c4c1e6948145434f083b3b1fa8b21e22
font_01_sfnt_off0000fbe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE4 10320 bytes
SHA-256: fc6f4f8f947dba779bf02399f38933b61bef3f5a826386cd6ded6824404846d3
font_02_sfnt_off00011ef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EF5 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2