Malicious PDF — malware analysis report

Static analysis result for SHA-256 a778cb925ca7ac08…

MALICIOUS

PDF

78.5 KB Authoring application: Smallpdf Desktop
MD5: eb483446ade9e6518442331056227034 SHA-1: 48c91707dfde85c20eb12b04f4205bce6278d808 SHA-256: a778cb925ca7ac08efd8387c266ccdea0beb79a065fcd37dbdfb3628c222d87b
152 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. The PDF contains a large number of embedded URLs pointing to other PDF files hosted on various domains, suggesting a link farm or redirection mechanism. The document body text is heavily corrupted and does not provide clear user-facing content, but the overall structure and URL distribution strongly suggest a phishing or content distribution attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 3

  • 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
  • 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://nothingeasylifestyle.com/uploads/1/3/0/4/130477018/6040234.pdf
    • http://beatdiggaz.com/uploads/1/3/0/3/130324289/xiwefaw-kadavub-woritipafokegol.pdf
    • http://newyorkpizzainabox.com/uploads/1/3/0/2/130288722/12cb48eab648.pdf
    • http://getinvolvedbeaverhead.org/uploads/1/3/0/4/130436074/38c9e17e3adc7.pdf
    • http://alyecollection.com/uploads/1/3/0/5/130551086/cb4dfe8a4884.pdf
    • http://legacytransportation-freightbrokerage.com/uploads/1/3/0/5/130589442/rivad.pdf
    • http://psychedelicsmadnessawakening.com/uploads/1/3/0/6/130605388/siperujikodu.pdf
    • http://treatsbyleets.com/uploads/1/3/0/5/130589429/mulesavenun_jirireg_fixuza.pdf
    • http://alessertraveledroad.com/uploads/1/3/0/8/130814190/9123926.pdf
    • http://nfsparts.com/uploads/1/3/0/2/130270872/fijanimot_dewiguradete_nafemosupe.pdf
    • http://shopfreetax.com/uploads/1/3/0/4/130436171/6683756.pdf
    • http://mastergamecraft.com/uploads/1/3/0/5/130588601/329f9c2e41e1ebb.pdf
    • http://hostmaster.henry.co.uk/uploads/1/3/0/5/130551623/2892805.pdf
    • http://alcojuice.com/uploads/1/3/0/3/130379488/2332397.pdf
    • http://reafashions.com/uploads/1/3/0/4/130490106/pozolukusi.pdf
    • http://qiessence.net/uploads/1/3/0/4/130483062/fivinejuvataf_vugozikokopeg_tizajatililazeb_vufanivaf.pdf
    • http://saferescuefordogs.com/uploads/1/3/0/2/130271212/107524.pdf
    • http://bob-tait.com/uploads/1/3/0/5/130550729/fupemovi_dejibetupa_bosax_funizijifovedep.pdf
    • http://foodireland.us/uploads/1/3/0/6/130603673/muritarip.pdf
    • http://pearlwonders.com/uploads/1/3/0/6/130604640/woputagoxat.pdf
    • http://adagencyvaluations.net/uploads/1/3/0/6/130621874/6d458f8.pdf
    • http://radardogs.net/uploads/1/3/0/5/130551335/ec77b0728.pdf
    • http://74-123-73-205.mgwnet.com/uploads/1/3/0/2/130289201/130289201.html#chronic+achilles+tendonitis+physical+therapy
    • http://nfsparts.com/uploads/1/3/0/2/130270872/fijanimot_dewi

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003042.bin
fe9cb49a7e2fdcabb38efba598367c7b8a51978d9e7a81e81f6337f191404e62
pdf-font-stream PDF embedded font (sfnt) at offset 0x3042 8588 bytes
font_01_sfnt_off0000eec2.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC2 16036 bytes