Malicious PDF — malware analysis report

Static analysis result for SHA-256 a966e0cb51bff5e0…

MALICIOUS

PDF

82.3 KB Created: 2021-03-11 08:47:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c9a1f37ce1171e7347b496825a1e72a9 SHA-1: 87409c7b9289f20125ba28dade3ad4b7791e9363 SHA-256: a966e0cb51bff5e0658322fa82ed1e36e5cf556eafd6fec9b6de6c35080d43b5
186 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 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/wix?keyword=hunting+lab+puppies+for+sale+in+michigan PDF link annotation
    • http://vvvvvvvvvvvvvvvvvvvvvb.xyz/software_engineering_project_reportsuw6l2.pdfIn PDF document text
    • http://yewes.space/yoga_sutras_of_patanjali_edwin_bryan8kbtx.pdfIn PDF document text
    • https://cdn.sqhk.co/lewulula/uILvihZ/kiko_alonso_joe_flacco.pdfIn PDF document text
    • https://cdn.sqhk.co/niramojiga/ggicwgg/17856548682.pdfIn PDF document text
    • https://cdn.sqhk.co/bodegife/mjfiieI/greenhouse_poly_sheeting.pdfIn PDF document text
    • https://cdn.sqhk.co/towevefizub/hUiiPjf/runescape_penguin_points_calc.pdfIn PDF document text
    • https://cdn.sqhk.co/damukowabij/6geijjg/vintage_milkshake_maker_for_sale.pdfIn PDF document text
    • http://hd-cam-mirror-up1.club/little_house_on_the_prairie_season_5_episode_194osfd.pdfIn PDF document text
    • http://fojenuf.iblogger.org/zaxopinoriwibesow.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420025/normal_5fdeb9b99a3a9.pdfIn PDF document text
    • http://kusulapezep.iblogger.org/ralejakatenojugurexopeg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381740/normal_602fd1633982f.pdfIn PDF document text
    • http://sodahq.club/octavia_butler_dawn_audiobook9wyir.pdfIn PDF document text
    • https://cdn.sqhk.co/serodozire/chiShio/egypt_ancient_history_of_african_philosophy_summary.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472760/normal_5feb0d30af6d4.pdfIn PDF document text
    • https://cdn.sqhk.co/vozeseseber/Sl9jhie/balance_limit_screen_time_ipad_ios_9.pdfIn PDF document text
    • https://cdn.sqhk.co/sedazozesufu/cFhiiid/ards_treatment_guidelines_2019.pdfIn PDF document text
    • http://vekeludin.iblogger.org/75602267186.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e148473a-3d1a-46f8-b788-fbc1f5af68d4.filesusr.com/ugd/e1e70b_7d8fbcd81cc244a29e05435075d914f0.pdf?index=trueIn PDF document text
    • https://f904ef53-caa1-4f0f-8a97-c50675c03ece.filesusr.com/ugd/2f8cea_9aa94e8dbd3b4966bfa17597c7f0da48.pdf?index=trueIn PDF document text
    • http://lupugavediroz.rf.gd/pijiditifovugix.pdfIn PDF document text
    • https://200c4c3d-185b-4246-b99f-f40cd7065c99.filesusr.com/ugd/3ed902_946c22c78ca040c6995158eda8b98b9b.pdf?index=trueIn PDF document text
    • http://worurekebisur.rf.gd/shazam_app_for_nokia_asha_201.pdfIn PDF document text
    • https://2a4c341d-9af7-4f89-b48a-1b926ad6ced7.filesusr.com/ugd/dd6616_bc31e7c48cd84053807857754f785101.pdf?index=trueIn PDF document text
    • https://034618a9-9b39-4f41-ad18-95bca1d1c80b.filesusr.com/ugd/48d9a1_51db0fb860304adfb0d7884b9c577ff3.pdf?index=trueIn 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_off000102b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B7 5528 bytes
SHA-256: 8965e6b5219ee7ae6783d219ed96a97361456f043f1ad315fa2156e81a1804b2
font_01_sfnt_off0001155b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1155B 11016 bytes
SHA-256: 209fda1dc34d2c9bcc3a47284c2d7a8bedfd849f9b554f4d7c7480a1b6134480