Malicious PDF — malware analysis report

Static analysis result for SHA-256 897982b5224058b2…

MALICIOUS

PDF

79.3 KB Created: 2021-04-19 13:49:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: a63f10379cddcca6feb41de0353e7852 SHA-1: a6220987bf12cc22bdb31a042c44730e01902508 SHA-256: 897982b5224058b2b2e9fcf8873106ff2a47106202d2f38ae591695e970750e8
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified as a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary attack pattern involves a phishing lure disguised as printer setup instructions, leading to a redirector URL that likely serves further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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+setup+hl-l2360dw In PDF document text
    • http://erkutungotu.com/mathematical_analysis_by_sc_malik_and_arora_free_download7zhyw.pdfIn PDF document text
    • http://lubenoredeji.mypressonline.com/management_of_grief_mukherjee.pdfIn PDF document text
    • http://kozugufasuroti.mygamesonline.org/61765225585.pdfIn PDF document text
    • http://tk-time.site/51858347582x8b8d.pdfIn PDF document text
    • http://kernig.online/43296445990nutpq.pdfIn PDF document text
    • http://belofakomag.mywebcommunity.org/toefl_academic_reading_passages.pdfIn PDF document text
    • http://nout-sale.site/how_to_find_dsc_master_codetzekm.pdfIn PDF document text
    • http://lalat.space/jaxebiwidi2a66q.pdfIn PDF document text
    • http://metryck.info/wawajuvulogoigjd4.pdfIn PDF document text
    • http://sozapemogoz.mygamesonline.org/wozig.pdfIn PDF document text
    • http://elinekici.online/xejovagekixumilu1iuw4.pdfIn PDF document text
    • http://walolexokesufa.sportsontheweb.net/salobaxefu.pdfIn PDF document text
    • http://mkr-olimp.info/chemistry_flame_test_lab_answersjdfpn.pdfIn PDF document text
    • http://hurleyshamburgers.com/zunifupixumamapawi037f2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://37e0f79d-b0c1-4727-b76d-5b759c81288f.filesusr.com/ugd/9c66ff_2f14667b0cbe4f9480ddbe61a68a4b7b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ropuba/behringer_reference_amplifier_a500_manual.pdfIn PDF document text
    • https://aa700e4b-9450-4a85-8b7e-8c92ffe47626.filesusr.com/ugd/de972d_7c8773f9500b4189bba2b2c852f5702b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wusone/dizaronobuwikalijibaw.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/bass_booster_pro_apk_mod.pdfIn PDF document text
    • https://1a441fb4-51dd-4528-a053-eb59ff664e18.filesusr.com/ugd/43d9d5_4070dfedc653489f8c7fac3bbf784ebe.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dabatisew/dajizesidivibox.pdfIn PDF document text
    • http://lutepotazor.onlinewebshop.net/android_tutorial_point_free_download.pdfIn PDF document text
    • http://fuguzametekobo.myartsonline.com/zebovafuwezufefubirova.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/apa_format_reference_page_citation_machine.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_off0000f891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF891 5416 bytes
SHA-256: 8d3ce4717c9ab1b5f59a255e4e0cf25b16cb8fb450f788023a4be036fd37ff1f
font_01_sfnt_off00010b17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B17 10736 bytes
SHA-256: 6664d17dfd228ffdec22ae7cc7e49b2a5186427f9f252f5780fba46f7a8cdf49