Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ca464fb77d723a4…

MALICIOUS

PDF

42.9 KB Created: 2020-03-24 16:15:44 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 12a31c114396b2034d5287db04323cdc SHA-1: 172a49b9dc0364f417a0e0bce5ee54afc7d1073f SHA-256: 0ca464fb77d723a49b73984eb8a6aa60b29fa32b19e0fe244657f9701e2b6b99
96 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a link farm, embedding numerous URLs that point to other PDF files hosted on various domains. The primary URL, 'http://djspizza1.com/uploads/1/3/0/2/130272428/130272428.html#stairway+to+heaven+hawaii+legal', suggests a lure to a specific page, while the broader link farm indicates an attempt to manipulate search engine results or distribute further malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 http://djspizza1.com/uploads/1/3/0/2/130272428/130272428.html#stairway+to+heaven+hawaii+legal
    • http://webdisk.dumfriesfirst.org/uploads/1/3/0/4/130435650/lowupivovede_vaxisaveses.pdf
    • http://aaconsultant.org/uploads/1/3/0/6/130604108/tadivekudalibamex.pdf
    • http://caribbeanflightschedules.com/uploads/1/3/1/1/131164249/4677874.pdf
    • http://conectads.org/uploads/1/3/0/7/130740320/17328128925.pdf
    • http://heidipaugutierrez.com/uploads/1/3/0/6/130604470/3235394.pdf
    • http://www.firebirdbobblehead.com/uploads/1/3/0/7/130776206/lumaxebeduku_tatixo.pdf
    • http://katieskindergarten.com/uploads/1/3/0/4/130476539/1578976.pdf
    • http://mx.nursingshare.com/uploads/1/3/0/7/130776070/kuzis.pdf
    • http://skywardmgmtconsulting.com/uploads/1/3/0/6/130639693/pususefodezatanubef.pdf
    • http://webdisk.bistroelan.com/uploads/1/3/0/6/130639155/67116ab982ef2b4.pdf
    • http://stijngeerinck.eu/uploads/1/3/0/7/130739783/tatamewapubujejase.pdf
    • http://boutiquevision.com/uploads/1/3/1/0/131069904/kipefojak.pdf
    • http://www.thundernthesky.com/uploads/1/3/0/6/130639872/guvuxifafupopifime.pdf
    • http://www.xaraxisinc.com/uploads/1/3/0/3/130323588/9bf1cb69ae1d.pdf
    • http://www.atlantica-aquatics.com/uploads/1/3/0/7/130739169/benifugi.pdf
    • http://careingpaws.net/uploads/1/3/0/3/130313619/00b23193cc5dd.pdf
    • http://avatarasocial.com/uploads/1/3/0/3/130379205/sesowogujogeviji.pdf
    • http://victoryhealthcarepartners.com/uploads/1/3/0/6/130639227/xutuno.pdf
    • http://rockhammerhdd.info/uploads/1/3/0/3/130313293/zojetininexulizazex.pdf
    • http://ellissportsperformance.com/uploads/1/3/0/7/130739393/fc765eff60e54.pdf
    • http://www.thinkingisnotillegal.com/uploads/1/3/0/3/130379213/rakeze-fisafiper.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007dea.bin
54f291928ef445ece7190bc8f3574679d69f742c5fd60e09a2f7569b33577a34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DEA 7888 bytes

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