Malicious PDF — malware analysis report

Static analysis result for SHA-256 961ba12572af87c8…

MALICIOUS

PDF

133.2 KB Created: 2021-01-17 15:23:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3d1397e15934097717a8836eae7e7234 SHA-1: 06b5cce952bf0eaf877e5f77627b3f13a2336608 SHA-256: 961ba12572af87c875f02e37fdcebde820e2f4dab6733b2afcce4e60001e9837
156 Risk Score

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 0.9997

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
  • 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://trafffe.ru/aws?utm_term=ar+rahman+tamil+songs+list++starmusiq PDF link annotation
    • https://site-1174586.mozfiles.com/files/1174586/21046410505.pdfIn PDF document text
    • https://cdn.sqhk.co/figakeves/gjPgeww/21318836218.pdfIn PDF document text
    • https://kiniwotonupit.weebly.com/uploads/1/3/0/7/130776343/fumatamujufa.pdfIn PDF document text
    • https://cdn.sqhk.co/sepovili/HKjchcf/us_online_electronics_shopping_sites.pdfIn PDF document text
    • https://cdn.sqhk.co/rubovadu/qgcjdie/semitic_religion_meaning_in_urdu.pdfIn PDF document text
    • https://site-1168030.mozfiles.com/files/1168030/live_tv_streaming_services_on_roku.pdfIn PDF document text
    • https://cdn.sqhk.co/simosukolevo/Khafhe1/clock_spider_location.pdfIn PDF document text
    • https://site-1176413.mozfiles.com/files/1176413/terranova_pizza_menu_bunnell.pdfIn PDF document text
    • https://site-1166626.mozfiles.com/files/1166626/id_protect_client_athena.pdfIn PDF document text
    • https://cdn.sqhk.co/rorifugera/geY3ih1/amazon_cyber_monday_start_time.pdfIn PDF document text
    • https://cdn.sqhk.co/pasojixaju/U6iKjaj/80061612451.pdfIn PDF document text
    • http:///\/www.paatuvarigal.com\/2016\/04\/naan-un-lyrics-from-In PDF document text
    • http:///\/www.paadalvarigal.com\/192\/snehidhane-snehidhane-ragasiya-snehidhane-alaipayuthey-song-lyrics.html,video_url:,zoomit:0,premium_content:0,is_premium:0,preview_url:null,rest_lev:0,rest_msg_free:null,rest_msg_paid:null,_e:0,aes_enabled:1,aet:1,release_date:JanIn PDF document text
    • http:///\/www.paadalvarigal.com\/571\/ennavale-adi-ennavale-kadhalan-song-lyrics.html,video_url:,zoomit:0,premium_content:0,is_premium:0,preview_url:null,rest_lev:0,rest_msg_free:null,rest_msg_paid:null,_e:0,aes_enabled:1,aet:1,release_date:AugIn PDF document text
    • http:///\/tamil-paadal-varigal.blogspot.in\/2008\/08\/kannamoochi-yenada-lyrics-kandukonden.html,video_url:,zoomit:0,premium_content:0,is_premium:0,preview_url:null,rest_lev:0,rest_msg_free:null,rest_msg_paid:null,_e:0,aes_enabled:1,aet:1,release_date:MayIn PDF document text
    • http:///\/www.lyricsinbox.com\/5332\/mei-nigara-lyrics-24,video_url:,zoomit:0,premium_content:0,is_premium:0,preview_url:null,rest_lev:0,rest_msg_free:null,rest_msg_paid:null,_e:0,aes_enabled:1,aet:1,release_date:AprIn PDF document text
    • https:///\/a10.gaanacdn.com\/images\/albums\/8\/2866108\/crop_175x175_2866108.jpgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/befarekogol/mettawee_community_school_vt.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/define_pleading_form.pdfIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/mobuvil.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/aflac_vision_insurance_claim_form.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/angetenar_rompasso_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/dividing_decimals_with_negative_numbers_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/50186737735.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_off0001bc07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BC07 5216 bytes
SHA-256: a4cea144bd512c61fb802735750e8d96df3982edf424c4416e10078c56002705
font_01_sfnt_off0001cd97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CD97 10788 bytes
SHA-256: bdd800545defc6e4b126a4c2a2e72167df4ad97ae53894a2a27f7741882228aa
font_02_sfnt_off0001f2a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F2A3 6008 bytes
SHA-256: e67a5ad211732b2dc88bd8b326813d4534a88a93a406d54fe18e66192b1a3862