Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b21f175bbee9c7d…

MALICIOUS

PDF

80.4 KB Created: 2021-04-17 05:12:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b316113684e3358ca94d172eaf372cbe SHA-1: cbe2691ef74cce4d02a07a249d92ca931ea38ad2 SHA-256: 1b21f175bbee9c7da15d0cc69dc3b04522083f91dec6d5ed650d053885da3b5e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9957

Heuristics 5

  • 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 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://dafemum.ru/strik?utm_term=unapproachable+east+3.5 PDF link annotation
    • https://cdn.sqhk.co/rizuwevize/jicdkih/filling_deep_holes_in_brick_walls.pdfIn PDF document text
    • http://twirlini.com/bosch_dishwasher_silence_plus_50_dba_manualsx3e3.pdfIn PDF document text
    • https://tazanuna.weebly.com/uploads/1/3/5/9/135977230/lipigamoritogadamoro.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471945/normal_6051c5dc225e5.pdfIn PDF document text
    • https://kobokudebixisog.weebly.com/uploads/1/3/5/3/135390699/8347548.pdfIn PDF document text
    • https://wibizoginoj.weebly.com/uploads/1/3/2/6/132681485/6470293.pdfIn PDF document text
    • https://cdn.sqhk.co/pananele/hbJiawd/45168704676.pdfIn PDF document text
    • https://cdn.sqhk.co/fekigimuzib/jdEidBt/gofalovadal.pdfIn PDF document text
    • https://cdn.sqhk.co/rigowodikot/cgjjb60/60889246962.pdfIn PDF document text
    • http://rowomonug.mywebcommunity.org/all_algebraic_identities.pdfIn PDF document text
    • https://kikokowenut.weebly.com/uploads/1/3/4/7/134713101/5874836.pdfIn PDF document text
    • https://giliruba.weebly.com/uploads/1/3/1/4/131483170/denola-zipawen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408485/normal_6065717042026.pdfIn PDF document text
    • https://cdn.sqhk.co/joxopejufito/i6FhhhL/31059068519.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368504/normal_600a576087333.pdfIn PDF document text
    • http://ridunculus.com/metorifaxokagifuwadzmybs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392649/normal_602306ea1dd1b.pdfIn PDF document text
    • http://lipazegeboludep.sportsontheweb.net/niv_study_bible_application_for_pc_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407756/normal_603a0ade9bb4b.pdfIn PDF document text
    • http://suporefebakibur.mygamesonline.org/the_grill_masters_essential_barbecue_recipe_book.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://soranodabiwegi.myartsonline.com/dairy_cow_feed_formulation.pdfIn PDF document text
    • http://bopiguxa.atwebpages.com/97415997736.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/57916040421.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/jaguar_car_hd_wallpapers_1080p.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/yamaha_rx-a740_review.pdfIn PDF document text
    • https://s3.amazonaws.com/dagasopones/jinip.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_off0000fb2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB2C 5472 bytes
SHA-256: 642ce1530493f1c4b24f30ec8929bdc8cd7d86520d7c5debbe3adc805befaa90
font_01_sfnt_off00010dc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC1 11148 bytes
SHA-256: 18f22c1a78af0dce4029e61f0072203f89353155bfe29ed60e31db961b6042a1

Open this report in the interactive analyzer, or submit your own file for analysis.