Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec58b4a12af70d99…

MALICIOUS

PDF

50.2 KB Created: 2020-05-14 20:59:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2f4931c41a32b5f21b522609c850392 SHA-1: 74011fee68d695b29bcb9e86bf79c975036f89ba SHA-256: ec58b4a12af70d99383d28dac75196b4f7fe7052b44d85ed68658e944ab318e5
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to PDF files hosted on various domains. The document body text, though partially corrupted, includes a reference to "Doodle army boot camp full apk", suggesting a lure to a malicious download. The primary malicious URL identified is http://droolresponsibly.com/uploads/1/3/1/4/131452818/131452818.html#doodle+army+boot+camp+full+apk, which likely hosts the next stage of the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://droolresponsibly.com/uploads/1/3/1/4/131452818/131452818.html#doodle+army+boot+camp+full+apk
    • http://aracal.com/uploads/1/3/1/8/131856242/fisisulefipi-biran-werebojupe.pdf
    • http://americasautoadvice.com/uploads/1/3/0/4/130476066/xeviwababuwipiduna.pdf
    • http://inspiredtravelsolutions.net/uploads/1/3/1/3/131382320/nofevafax_nupip_nevakereriz.pdf
    • http://yuri-izakaya.com/uploads/1/3/1/4/131482916/1080bc1c1f62.pdf
    • http://eieminnesota.org/uploads/1/3/0/5/130546519/zuwudigobige-fijuwudekaduz-geditapomamiw-vuparawaleja.pdf
    • http://modernmuslimgirl.com/uploads/1/3/1/4/131437640/maxatamuvo.pdf
    • http://josephmcmichael.com/uploads/1/3/0/5/130539345/9426866.pdf
    • http://basehi.com/uploads/1/3/1/4/131483719/ximirafoxatokoj.pdf
    • http://atastingevent.com/uploads/1/3/0/3/130313555/galavipigileponafi.pdf
    • http://greenwavecyprus.com/uploads/1/3/0/5/130539553/lezaxejewaleg.pdf
    • http://cassiecares.org/uploads/1/3/1/8/131856225/geganepetikuzu.pdf
    • http://lopery.com/uploads/1/3/0/6/130604653/zagowatolijuz.pdf
    • http://shesjustamom.com/uploads/1/3/0/7/130739535/puresukofemigemuro.pdf
    • http://ats-chb.com/uploads/1/3/0/8/130874130/ae07c72.pdf
    • http://sirromfloatspa.com/uploads/1/3/0/6/130621206/parivigolus.pdf
    • http://dasmutterschiff.de/uploads/1/3/1/3/131383665/7193416.pdf
    • http://therestaurantfixer.com/uploads/1/3/1/4/131483337/tuwupik.pdf
    • http://policetrailer.com/uploads/1/3/1/8/131856310/f85f395c8c2f4d0.pdf
    • http://crowleyfirstumc.com/uploads/1/3/1/1/131164204/8131098.pdf
    • http://marrygoride.com/uploads/1/3/0/5/130588976/1292955.pdf
    • http://marenhenson.com/uploads/1/3/0/6/130620789/7e3f9.pdf
    • http://grief-is.com/uploads/1/3/0/6/130620326/toniveniri_dijojitu_beduzepan.pdf
    • http://theshxtshow.shop/uploads/1/3/0/8/130814328/sidixapobin_bajurolapeba.pdf
    • http://smartmobilityusa.co/uploads/1/3/0/3/130379213/11dd9ec0de.pdf
    • http://lend-life.com/uploads/1/3/0/7/130775551/vuluxe.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
stream_004_off0000987a.bin
03a82c2e3cf0e0d901f223ecbb3cc3f1a72ca4ba9789e9452f4394596a1f6088		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x987A 20716 bytes
font_00_sfnt_off00006a25.bin
f5a3e0886b95c9b467f99b5e94d28133f575fbf2270330b68ad91cfe8bde1cf1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A25 1884 bytes
font_01_sfnt_off00007343.bin
d23255016b2f8ae9a287bb52cb8cb5680ef2d79164a77df7bb4c52ebdfeb478e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7343 11128 bytes

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