Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fd7b1808886e74d…

MALICIOUS

PDF

43.4 KB Created: 2020-03-28 03:16:30 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 8f788b66ca1f911ea23cc82691f27d3f SHA-1: 300c6e0fed0a653dd2434656bbe380a32302d1d8 SHA-256: 7fd7b1808886e74d48c3bde273ffc26fabc8923e92ffdb6b43e6ab5923e509fa
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which are dynamically generated and point to other PDF files. This behavior is characteristic of a link farm or SEO poisoning attack, designed to drive traffic to various websites. The document body, though partially corrupted, suggests a lure related to children's crafts, which is likely a deceptive tactic to encourage clicks on the embedded malicious links.

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://bernardobellostudio.com/uploads/1/3/0/4/130435697/130435697.html#manualidades+para+ni%C3%B1os+peque%C3%B1os+de+navidad
    • http://www.joanneboston.net/uploads/1/3/0/6/130605280/4046072.pdf
    • http://www.pause-store.com/uploads/1/3/0/5/130590569/bfb49684.pdf
    • http://office365online.live/uploads/1/3/0/5/130590545/nolavaxu_puvipubivuwuzi_menikasug_wikapetebag.pdf
    • http://mslauramichelle.com/uploads/1/3/0/5/130539913/binexew.pdf
    • http://mollyandwolf.com/uploads/1/3/0/4/130490250/rosipus.pdf
    • http://incamamas.com/uploads/1/3/0/3/130324420/vawugapiwovadas.pdf
    • http://infinitumnihilmedia.net/uploads/1/3/0/5/130551325/dumasetuwelemo-murorol-xanivixaved-tofabegozeke.pdf
    • http://webseo.studio/uploads/1/3/0/7/130739362/sebuvipugive-lubejevepip-mufobowo.pdf
    • http://kingfisher-strategy.com/uploads/1/3/0/6/130604310/vetubijavipuvizi.pdf
    • http://www.lasperlasflushing.com/uploads/1/3/0/5/130543310/9111774.pdf
    • http://prettylittlewaistline.com/uploads/1/3/0/6/130639160/2827673.pdf
    • http://ventureapp.net/uploads/1/3/0/3/130323214/adb4b9be9a2d1.pdf
    • http://mta-sts.shop-fit.com.au/uploads/1/3/1/0/131069893/0d255aaf.pdf
    • http://obviousfraud.com/uploads/1/3/0/2/130271114/f37604f02e73.pdf
    • http://adventureswithrocks.com/uploads/1/3/0/7/130776159/zotop_wufutijamerivu_migajejaz.pdf
    • http://campuscrowd.in/uploads/1/3/0/5/130539735/gukowijititipugikaza.pdf
    • http://www.chadjukes.com/uploads/1/3/0/8/130813478/fizab.pdf
    • http://cobaltcares.org/uploads/1/3/0/6/130639709/rizezidako_delif_ledopidu.pdf
    • http://puredogbreedregistry.com/uploads/1/3/0/2/130291556/08c61f.pdf
    • http://freebirdssalon.com/uploads/1/3/1/0/131070491/golikixij_nobusiwifane_tatalug.pdf
    • http://iwusigmapi.org/uploads/1/3/0/6/130640162/8581207.pdf
    • http://proudparents315.com/uploads/1/3/0/8/130814353/6740747.pdf
    • http://cemsinternational.com/uploads/1/3/0/7/130775969/4222542.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_off00007e38.bin
b65b2da87c0c1fb76255cef72432c9705884dbbfab71a00725d1e03c26581f69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E38 8564 bytes

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