Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ba7ff8fc987cb15…

MALICIOUS

PDF

99.1 KB Created: 2021-04-27 11:43:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: b119a3d0b738926a4106442ad23f6b67 SHA-1: 5371667d6f079660285a367b094b903c9179256f SHA-256: 1ba7ff8fc987cb15f78ef601bf028745e08174b9667b47b06e74c67f67a47bd9
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The document body, though partially corrupted, suggests a lure related to connecting a singing machine, which is likely a pretext to drive users to the malicious URLs. No scripts were extracted, but the presence of multiple links to disposable hosting and redirectors points to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=how+to+connect+my+singing+machine In PDF document text
    • http://bugosegu.scienceontheweb.net/paulo_coelho_adultery_romana.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444644/normal_5fca6d987e622.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450356/normal_60215db4a4853.pdfIn PDF document text
    • http://nosinoski.shop/84941502406bdkt4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407057/normal_606abd7f674c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378619/normal_603d06d093ab5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496826/normal_5fd68ad85d850.pdfIn PDF document text
    • http://haustova.com/66133818612xzhci.pdfIn PDF document text
    • http://kamefutebiwef.mywebcommunity.org/leparudisaruk.pdfIn PDF document text
    • http://kexumojazo.mypressonline.com/strength_and_durability_of_concrete.pdfIn PDF document text
    • http://mattelipsticks.site/60318293231xl7iw.pdfIn PDF document text
    • http://vanlit.ru/3225379634732pyh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vavilonogamet.epizy.com/vajelofuvivebuwavelu.pdfIn PDF document text
    • http://lupemuvuxetamok.epizy.com/pdf_test_file_generator.pdfIn PDF document text
    • http://lodusebivepakef.epizy.com/water_cycle_worksheet_middle_school.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/govodotezilij.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/62903791337.pdfIn PDF document text
    • http://kirawolus.rf.gd/98111314422.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/what_does_color_yellow_signify_in_the_bible.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/bootstrap_4._3._1_form_validation.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/zovopok.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012e3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E3F 5240 bytes
SHA-256: 05fd92720879e45f6e2771c74a920c9cafb21fdfaa7544f11470b40a81016640
font_01_sfnt_off0001400a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1400A 12596 bytes
SHA-256: 1f47cdd5e0b19f1deb6a8810c5930af6e9acecd90e09a19759ab5fa425b25bb6
font_02_sfnt_off00016a28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A28 16060 bytes
SHA-256: 99ddc6f5858eb134f8024171ebe717cbd02485c31471b921a5021903b5272953

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