Malicious PDF — malware analysis report

Static analysis result for SHA-256 762539a1c3e0da96…

MALICIOUS

PDF

40.2 KB Created: 2020-03-11 09:08:09 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 8f49ffa63421c85b16652d005efeaff4 SHA-1: a0d77eaf555029cf7f395f4870decfb21699ba63 SHA-256: 762539a1c3e0da9634a418392f7bd1466f9d1e1e076f9c566313e1c6d4bb6348
96 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO spam or to redirect users to malicious sites. The ML classifier strongly indicates maliciousness, and the presence of embedded URLs suggests an attempt to drive traffic to potentially harmful content. No scripts were extracted, but the PDF structure and link farm heuristic point to a malicious intent to redirect users.

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://wangshangzhenrenqipai.br3h.com/uploads/1/3/0/5/130541271/130541271.html#powerflex+525+ethernet+speed+control
    • http://360landscaping.net/uploads/1/3/0/4/130483514/kiwoga.pdf
    • http://arfforum.com/uploads/1/3/0/7/130776516/gonimunutijokusik.pdf
    • http://pursuitofhappiness.live/uploads/1/3/0/7/130738497/tuxazirag.pdf
    • http://tupgamradio.com/uploads/1/3/0/6/130621392/kajowel_miledotas.pdf
    • http://perspectivecp.net/uploads/1/3/0/6/130639972/furupimatazufuweb.pdf
    • http://agapanthus-plants.com/uploads/1/3/0/7/130775268/komejuxisa-felig-wurebovezuze-dedoj.pdf
    • http://forgottenpeopleorganization.org/uploads/1/3/0/7/130776182/2674582.pdf
    • http://indycomicsexpress.com/uploads/1/3/0/5/130543099/kutatewakexunitel.pdf
    • http://mail.curriculumconsults.com/uploads/1/3/0/2/130270996/755f356d7d9f7fc.pdf
    • http://5toolgroup.com/uploads/1/3/0/5/130550928/pejopojoju.pdf
    • http://sjb-productions.com/uploads/1/3/0/4/130435990/xunozotafele.pdf
    • http://autodiscover.pokebattles.gfx-pro.net/uploads/1/3/0/2/130289177/6129448.pdf
    • http://gracefullanding.net/uploads/1/3/0/6/130639282/zaxituga-pomizun-rezafow.pdf
    • http://aerialadvantagepoint.com/uploads/1/3/0/6/130604039/aef5e41a.pdf
    • http://houstonsteinway.net/uploads/1/3/0/2/130289756/pebapil-vesezabizugoka.pdf
    • http://hostmaster.estc.org.uk/uploads/1/3/0/4/130478123/9706519.pdf
    • http://www.sigaseumapa.com/uploads/1/3/0/5/130543261/6437314.pdf
    • http://bestcosmeticplasticsurgery.com/uploads/1/3/0/7/130740141/140abc00.pdf
    • http://internetstudiescenter.net/uploads/1/3/0/3/130313525/pubuvanesenujopi.pdf
    • http://www.cvqualityroofinginc.com/uploads/1/3/0/4/130436313/laxurilot.pdf
    • http://chrislloydmusic.com/uploads/1/3/0/5/130544754/bugatozonawog.pdf
    • http://ns1.fatcow.bethlehemstar.org/uploads/1/3/0/6/130620963/8963651.pdf
    • http://nkbcapital.com/uploads/1/3/0/8/130814343/ec03aab45dce8ea.pdf
    • http://rtbartist.com/uploads/1/3/0/4/130476339/e01daf6.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_off00007109.bin
6077806df5840e9812c4f8a78b1d5f716af6a1fe900ca5f083bd2eb5760cf3af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7109 8876 bytes

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