Malicious PDF — malware analysis report

Static analysis result for SHA-256 30fb01df92f7a1cb…

MALICIOUS

PDF

42.8 KB Created: 2020-03-18 12:02:11 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f5123f6ae3ffcb1c8a32a8f0b40eebf2 SHA-1: 876471d4e350aa9e3191a7dce79bfb96a2eadef9 SHA-256: 30fb01df92f7a1cb9b0b9bbc7ccbf1a9f84bcc569e2d2727ce2b15ba02053529
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links, many of which are numerically or generically named and hosted on various domains, indicating a link farm or SEO abuse tactic. The primary external URI points to a page that appears to be related to academic papers, suggesting a lure to disguise malicious intent. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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://lykkenkommerindefra.dk/uploads/1/3/0/7/130776408/130776408.html#ib+physics+sl+paper+3+past+papers
    • http://www.alitiumweltservice.de/uploads/1/3/0/6/130620877/tuwavajurojodute.pdf
    • http://hogarjireh.com/uploads/1/3/0/8/130873850/82f21.pdf
    • http://zelithsolution.com/uploads/1/3/0/7/130739128/kevumo.pdf
    • http://server.earllproperties.com/uploads/1/3/0/2/130288893/zawalimoxonapitimaw.pdf
    • http://absolutely-coraldee.com/uploads/1/3/0/7/130738855/rizubulu.pdf
    • http://melaniefrobisher.com/uploads/1/3/0/4/130476632/ec29ba6aafc.pdf
    • http://catholicnewmancenterlssu.org/uploads/1/3/0/6/130621958/6e09216864a.pdf
    • http://raccoonremovalcharleston.com/uploads/1/3/0/2/130271111/vixiwawepakada_segederupaz_sumowalidekar.pdf
    • http://terranovaroofingsolutions.com/uploads/1/3/0/5/130589115/d833b055ca80d6.pdf
    • http://slaymakeupandhair.com/uploads/1/3/0/7/130775744/1818447.pdf
    • http://dfaofficial.com/uploads/1/3/0/8/130813651/besoba.pdf
    • http://liloubella.com/uploads/1/3/0/7/130739500/xeguxor.pdf
    • http://shanefaddis.com/uploads/1/3/0/3/130313391/reduman.pdf
    • http://www.mlsweettreats.com/uploads/1/3/0/6/130620857/2796577.pdf
    • http://holymuron.com/uploads/1/3/0/5/130541763/momadetome.pdf
    • http://dwainreynolds.com/uploads/1/3/0/9/130969082/c1f92.pdf
    • http://hostmaster.kasperkreations.com.au/uploads/1/3/0/8/130874026/zasapamogatuw.pdf
    • http://www.energeticartspractitioner.com/uploads/1/3/0/2/130272361/lerovap_serejoxetaxejuk_ximanufomu.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_off00007c6c.bin
23e829268ff121a422d61083071e7acc025f2824167f3d4d9cebf563e4baaa30
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C6C 8760 bytes