Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3e5c98ddb7dd96f…

MALICIOUS

PDF

50.6 KB Created: 2020-03-27 09:25:51 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1115eeccb00117c6e12b7d7ed9e9d313 SHA-1: 48440a32e89feedc39426b95956eaaebf8c1d7ca SHA-256: a3e5c98ddb7dd96fdc94be96ae25ca3ec2f3a738869eda34a3d0366fe8a10dcb
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was flagged by an ML classifier as malicious and contains a large number of external links, indicating a potential SEO poisoning or link farm attack. The primary URL identified is http://beaverdamchurchonline.org/uploads/1/3/0/2/130288444/130288444.html#que+es+un+plotter+en+informatica, and numerous other PDF links were found hosted on various domains, suggesting a coordinated effort to distribute malicious content or manipulate search engine results.

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://beaverdamchurchonline.org/uploads/1/3/0/2/130288444/130288444.html#que+es+un+plotter+en+informatica
    • http://mx.joshuabenking.com/uploads/1/3/0/5/130542940/3323034.pdf
    • http://www.seemombestrong.com/uploads/1/3/0/6/130620234/8963906.pdf
    • http://kosmobullies.com/uploads/1/3/0/6/130620546/kejovuxuraxuk.pdf
    • http://www.jsic.eu/uploads/1/3/0/3/130313004/mafujaf-wemoti-vavuxepogomale.pdf
    • http://positiefsamenwerken.org/uploads/1/3/0/7/130740624/gikob.pdf
    • http://nicolesnaturals.blog/uploads/1/3/0/4/130489159/3c2595e2f8ef.pdf
    • http://mta-sts.exdeadguy.com/uploads/1/3/0/4/130476616/mexonebusubev-xulirerupinifo-sumik.pdf
    • http://myholisticskinclinic.com/uploads/1/3/0/5/130550665/witerosasekimevepif.pdf
    • http://crazy4ink.com/uploads/1/3/0/8/130874296/gozenob-jamiwomikep-wopekijoganiz.pdf
    • http://thesongstress.com/uploads/1/3/0/8/130814226/dujabudufilu_dulapove_popuma_lukebaj.pdf
    • http://mail.abelpena3x.com/uploads/1/3/0/5/130543536/nadizewotono-wofujolukivil-jipajejedijow.pdf
    • http://path2.health/uploads/1/3/0/8/130873983/2366230.pdf
    • http://cancerhousing.com/uploads/1/3/0/8/130813877/kideziteb-lobamadetovovu-wekubomesogo.pdf
    • http://ilovefatjacks.club/uploads/1/3/0/5/130588478/527904.pdf
    • http://boxerboogiefun.com/uploads/1/3/0/7/130775143/dalofos.pdf
    • http://pointonenola.com/uploads/1/3/0/9/130969473/guvaji_dosugevufex.pdf
    • http://mcncleaningservicesllc.net/uploads/1/3/0/7/130775922/dideruset_noluzup_bekeg_tosenib.pdf
    • http://baughmansmagicseal.com/uploads/1/3/0/7/130775522/vabofuwewidu-nolekin-kivibuf.pdf
    • http://latercomics.com/uploads/1/3/0/4/130436313/popupi-pirapojiku-kedaxubosewib.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a1f.bin
376326f7075c4ea1e7674858850a001764cfc91c0f53ec99e4cf55c5f8d2a00a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A1F 9440 bytes
font_01_sfnt_off00009c6a.bin
e91619dfd4c72a85464d95ef1ba4e67df13020651c42071bafbe521a61d9f7fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C6A 2652 bytes
font_02_sfnt_off0000a5d1.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5D1 16036 bytes

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