Malicious PDF — malware analysis report

Static analysis result for SHA-256 10f9d2cb8e2351ea…

MALICIOUS

PDF

82.4 KB Created: 2021-03-22 12:36:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 3c7931f2aec94f2410e99a9b31c013f9 SHA-1: f6bc63fbdea8ee007f92b2135cbc3ca53c6ec303 SHA-256: 10f9d2cb8e2351eac7171097f213ee75c180d65832af6ffb94c0be82d8a557ac
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with at least one identified as a known malicious redirector. The document body, though partially obfuscated, suggests a lure related to 'air frying' to entice users to click on these malicious links. The presence of multiple disposable domains and link farm characteristics further supports a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/strik?utm_term=how+to+air+fry+in+nuwave+duet In PDF document text
    • http://latencfsrt.space/google_chrome_speed_slows5irs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427529/normal_601705409b6b9.pdfIn PDF document text
    • http://lasleymarkt.ru/zutesnvwfw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404755/normal_602f5f9371e12.pdfIn PDF document text
    • http://xafopawiki.medianewsonline.com/runir_deux_en_un_seul.pdfIn PDF document text
    • https://dirifulezidume.weebly.com/uploads/1/3/2/7/132740871/buwaselale.pdfIn PDF document text
    • http://bumumapa.mypressonline.com/wuvisegena.pdfIn PDF document text
    • https://baxelawinojiw.weebly.com/uploads/1/3/4/3/134333718/4470979.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462339/normal_5fe3bc9631088.pdfIn PDF document text
    • http://gevenukodujojov.getenjoyment.net/feruwetavonagujebozelup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488323/normal_6054f54e442a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403131/normal_5fc6f9c5be203.pdfIn PDF document text
    • http://xxlmature.site/guborepawupafozoverohz28s.pdfIn PDF document text
    • http://sokolov.fun/what_is_the_point_of_letter_from_birmingham_jailwqumd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469836/normal_6001eaa936b47.pdfIn PDF document text
    • http://streamsweets.com/canadian_passport_renewal_childk31ui.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444386/normal_5fee17ea46913.pdfIn PDF document text
    • http://dexiwakuxabef.medianewsonline.com/chemistry_class_12_formula_sheet_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://pevipitoz.atwebpages.com/buku_bidayatul_mujtahid.pdfIn PDF document text
    • http://tudixuzaw.onlinewebshop.net/29898417524.pdfIn PDF document text
    • http://luvetux.myartsonline.com/dikudovujezuvoguj.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DA 4788 bytes
SHA-256: 21dc4026de8e9406017748162d29faaa7f9a9ce78a45904f69f10b7fcc4dcc9f
font_01_sfnt_off0000f341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF341 11008 bytes
SHA-256: 18f4a022d37ca23cd4215d402054f39a3cd5222a31a65a7b8579a8a268b5acfd
font_02_sfnt_off000118f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118F9 16184 bytes
SHA-256: 59bd9faf73b945fa4dd601516dbb9186deacf479735410a520c5b6c7f94add4f
font_03_sfnt_off00012e20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E20 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e