Malicious PDF — malware analysis report

Static analysis result for SHA-256 818a2df834d00dd1…

MALICIOUS

PDF

35.5 KB Authoring application: Smallpdf Desktop
MD5: 4aad77c856fed6c389d615be28c40899 SHA-1: 5ebb5721b60626990cb76b8f518ef912c01a15a9 SHA-256: 818a2df834d00dd1251253548262ee354871ad8ab7270fc8b2e7d109a092e073
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links to external PDF files hosted on various domains, indicating a link farm or redirection scheme. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure points to a spearphishing attachment.

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.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://lucidpapercuts.com/uploads/1/3/0/6/130639495/a5763bafb61c.pdf
    • http://sennad.store/uploads/1/3/0/2/130287537/debelapidoretodoma.pdf
    • http://theodishthoughts.com/uploads/1/3/0/7/130776267/sizevanunafel_gapebi.pdf
    • http://formormedia.com/uploads/1/3/0/2/130289443/8693315.pdf
    • http://joshuachi.net/uploads/1/3/0/5/130551059/1382867.pdf
    • http://ralphcoevents.com/uploads/1/3/0/5/130590122/zitosoxisaxopu.pdf
    • http://berksdogtraining.org/uploads/1/3/0/6/130620679/nevopibesosevim_loniraxulem_vepuxelo.pdf
    • http://journalofdentalpracticemanagement.com/uploads/1/3/0/6/130603965/gamala.pdf
    • http://nicolassebastiani.com/uploads/1/3/0/4/130435803/23db0ea.pdf
    • http://www.evangelismfireministries.net/uploads/1/3/0/7/130775269/jitunijat.pdf
    • http://morelovemorelight.com/uploads/1/3/0/6/130604045/8b1cdbd33d.pdf
    • http://www.mayfairtex.com/uploads/1/3/0/6/130605001/f8193.pdf
    • http://afhe.org.au/uploads/1/3/0/6/130621608/cd91b.pdf
    • http://businessrescuene.com/uploads/1/3/0/2/130272081/lasatemovadakid-namafumunu-wijiregegojimi.pdf
    • http://babuni.ca/uploads/1/3/0/6/130622091/soviwesi.pdf
    • http://authorjulievail.com/uploads/1/3/0/2/130270808/xusotiginom.pdf
    • http://theapothecarygroup.org/uploads/1/3/0/4/130476976/2429743.pdf
    • http://buysellbell.com/uploads/1/3/0/5/130541661/1815087.pdf
    • http://andepena.com/uploads/1/3/0/7/130739723/texevoxixisa-pajixerolese-ravepu-razege.pdf
    • http://ankabhi.org/uploads/1/3/0/5/130547150/menovolukuvew_rawum_zeguwajor.pdf
    • http://9oeyv.slpny.com/uploads/1/3/0/7/130739579/130739579.html#ileana+d%27cruz+recent+photos

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002bef.bin
8aada4482d8b756c125990d9c12b14a2cfa9413927a9c714321ad2ce8e59f165		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BEF 7568 bytes

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