Malicious PDF — malware analysis report

Static analysis result for SHA-256 f68bb691028d2c1f…

MALICIOUS

PDF

68.6 KB Created: 2021-03-24 16:27:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5d022bb7f5091932fb4752978d2d70b7 SHA-1: 5740ae6472631fb56a6bd5ca67b32d90e3a96a38 SHA-256: f68bb691028d2c1f6f0a48f4242a6e82718e29d6990138d662568c0682e15d88
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://baarspo.ru/123?utm_term=holly+leaf+outline+template PDF link annotation
    • http://nitafibejuze.mygamesonline.org/logical_operators_in_java.pdfIn PDF document text
    • https://lenoloxib.weebly.com/uploads/1/3/4/0/134040664/14985.pdfIn PDF document text
    • http://fojekoxezosuko.22web.org/sibulotigurudupopogojidij.pdfIn PDF document text
    • http://kirakexig.mypressonline.com/taxurobafoweromuz.pdfIn PDF document text
    • https://dupilike.weebly.com/uploads/1/3/4/7/134772583/beledotovazif.pdfIn PDF document text
    • http://nipawifaxupus.mygamesonline.org/nexekikowa.pdfIn PDF document text
    • http://lelekelosutov.getenjoyment.net/gejikoso.pdfIn PDF document text
    • https://pewenotevis.weebly.com/uploads/1/3/4/5/134597539/regabipu_delim_wawevamajobine.pdfIn PDF document text
    • http://jetavimazi.22web.org/mw3_cheats_xbox_one.pdfIn PDF document text
    • https://folarudivol.weebly.com/uploads/1/3/1/8/131871739/9899181.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://paxugevobudutis.epizy.com/ballroom_e_youkoso_ost_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/stoeger_m3500_waterfowl_review.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/sedif.pdfIn PDF document text
    • http://tigagatu.atwebpages.com/45291427898.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/84737565936.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/spalding_48_basketball_system_assembly.pdfIn PDF document text
    • https://s3.amazonaws.com/fekife/47800668318.pdfIn PDF document text
    • http://bokatamekal.rf.gd/63621836431.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/texas_securities_act.pdfIn PDF document text
    • https://s3.amazonaws.com/veledabejufi/is_billing_information_protected_under_hipaa.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c93f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC93F 4836 bytes
SHA-256: 6f897043a84400c61daa82010666774533071b59e6eb21f2b4355b729fb99432
font_01_sfnt_off0000d9aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9AA 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off0000e238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE238 10120 bytes
SHA-256: 8e2ee3d5ccea262be210af25b8c2a48143eb61a9facc987dfab7e4a29e7d4852

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