Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddc7710d7958899d…

MALICIOUS

PDF

73.0 KB Created: 2021-03-29 16:36:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: bff87fea72685890089d95ddc7d4f114 SHA-1: c769e3ad6e782c147449e9f42433c4350e2c38c7 SHA-256: ddc7710d7958899d987973a65dc72a3d3f84a8dc0028a620ca8b36e49a55f1b2
244 Risk Score

Malware Insights

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

The PDF document contains embedded links that lead to known malicious redirector infrastructure and a link farm on disposable hosting. The document body, though partially corrupted, suggests a lure related to laptop charging issues. The presence of numerous external links and the ML classifier flagging it as malicious indicate a phishing or redirection attempt designed to lead users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://dafemum.ru/strik?utm_term=why+is+my+laptop+not+charging In PDF document text
    • http://sdek-24.cc/relgio_casio_g-shock_masculino_dw-9052gbx-1a9dr828ib.pdfIn PDF document text
    • http://hayatevesigar.online/same_old_love_chords_pianopnzv7.pdfIn PDF document text
    • http://fidesuwuranotif.getenjoyment.net/netajate.pdfIn PDF document text
    • https://zudovizu.weebly.com/uploads/1/3/4/3/134338339/vapanilaxaju.pdfIn PDF document text
    • http://euroshopmn.space/58540231813q757w.pdfIn PDF document text
    • https://nozatagi.weebly.com/uploads/1/3/3/9/133986497/0a159691b0a34a.pdfIn PDF document text
    • http://govuxojikasumot.scienceontheweb.net/bixalokuw.pdfIn PDF document text
    • https://nipixajivoru.weebly.com/uploads/1/3/1/4/131436983/3756639.pdfIn PDF document text
    • http://lebedugipul.mywebcommunity.org/antonyms_worksheets.pdfIn PDF document text
    • http://slmit.space/identify_types_of_pronouns_worksheet_with_answersh5deh.pdfIn PDF document text
    • http://xawaviki.iblogger.org/gudosixowa.pdfIn PDF document text
    • http://jamotovoxut.mywebcommunity.org/37147299746.pdfIn PDF document text
    • http://wacc-cat.org/zunizobezetejolekx9ms.pdfIn PDF document text
    • http://xuxijosut.sportsontheweb.net/jaxiwafa.pdfIn PDF document text
    • http://tizuzagejuropol.22web.org/nosexatedotawugokiba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6acf0ca1-aa41-4771-8b91-54baff69ee7f.filesusr.com/ugd/7d1dc9_6c8cc2d56838475c936dcbf7d1b73f95.pdf?index=trueIn PDF document text
    • http://wageparu.epizy.com/oppo_105d_specs.pdfIn PDF document text
    • http://luzeparuzibez.rf.gd/kumon_answer_key_level_k_math.pdfIn PDF document text
    • https://59b17237-83b3-47c6-9d40-f547da5b0434.filesusr.com/ugd/827194_40f3a2a1919449e3929aa72dcc0acda2.pdf?index=trueIn PDF document text
    • https://da550aaf-34ae-4f9b-ad82-7836b82beebe.filesusr.com/ugd/a203e6_6240618f306d4fd38094a7ab9031bf18.pdf?index=trueIn PDF document text
    • https://994180ce-385f-4272-9833-4a204a825e0f.filesusr.com/ugd/ec0c41_45d607e9eab84e7f9a0fcee88ff51523.pdf?index=trueIn PDF document text
    • https://144c9d4d-401b-437b-b89f-6a5816d7da47.filesusr.com/ugd/cd33f5_0678f0879ade41fea210d0093f7d833a.pdf?index=trueIn PDF document text
    • http://pokukalaso.rf.gd/96211018755.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_off0000df2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2E 5464 bytes
SHA-256: e38d0dfc61c444ff73510d487753fab700ba83317ef5c0567eefa26d2c9a4e49
font_01_sfnt_off0000f1a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A8 10960 bytes
SHA-256: 46e5aacb5d8012ae352aa1bd8e7fe195a5d2176969e11edcb1ac45c43f8fb82c