Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa7e7c577bb64d9d…

MALICIOUS

PDF

80.4 KB Created: 2021-02-25 03:27:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 20906cee63998f929700e8c23fc59668 SHA-1: c46a1f56890e1b5b881ee33e3d0ef08724442d61 SHA-256: aa7e7c577bb64d9d81194c183b81d96314302c0603763b2baa285ccc841279c8
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links pointing to suspicious domains, with one heuristic explicitly identifying it as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the presence of malicious links suggests the document is designed to redirect users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://yafferge.ru/award?keyword=metro+2035+audiobook In PDF document text
    • http://dorisebadun.22web.org/zokibonebemojarobod.pdfIn PDF document text
    • http://card2card-perevod24.site/yamaha_tyros_2_manuale_italianombnbz.pdfIn PDF document text
    • https://cdn.sqhk.co/pafitevet/z9Wyhjh/mountain_bike_racing_games_for_android.pdfIn PDF document text
    • http://vetokikiw.22web.org/75943793414.pdfIn PDF document text
    • http://spencermcman.us/mavebozoy9t17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388050/normal_60247df741907.pdfIn PDF document text
    • http://gakajolojogin.iblogger.org/85486870076.pdfIn PDF document text
    • http://big-ita.space/nessun_dorma_story_endingd1gz8.pdfIn PDF document text
    • http://matroskin.space/60685353949dc35b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503692/normal_5ffd0414e078e.pdfIn PDF document text
    • http://trudogoliya.online/calculating_average_atomic_mass_practice_worksheetqg593.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386842/normal_5fe530501fcd0.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvitatutuv/jhtgcgg/23561166953.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454673/normal_601735fb3574e.pdfIn PDF document text
    • http://obzorov.site/vikifesj01jt.pdfIn PDF document text
    • http://mir23.xyz/breakfast_at_tiffanys_movie_download_utorrent8izga.pdfIn PDF document text
    • https://cdn.sqhk.co/rorazelesu/gUrhjgX/ants_horror_movie_trailer.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sepusuvom.epizy.com/fire_and_ice_condoms_cause_yeast_infections.pdfIn PDF document text
    • http://mivajale.rf.gd/meaning_of_poor_academic_performance.pdfIn PDF document text
    • http://badavusepewojo.epizy.com/garage_sale_pricing_guide_toys.pdfIn PDF document text
    • http://situbepid.epizy.com/bimonezunozujirenaj.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_off0000fc8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC8C 5380 bytes
SHA-256: 4871356d0b3bd353b409e6d85941dc6cad3967fe78b91ef53d1924e00186e59e
font_01_sfnt_off00010ef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF0 11180 bytes
SHA-256: 63c0095f964cc32ecd99ee1b66da619eb15e0bf6fd762ca9fcaf23adf01ac684

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