Malicious PDF — malware analysis report

Static analysis result for SHA-256 36ba08b02bc1bce6…

MALICIOUS

PDF

84.8 KB Created: 2021-07-19 20:45:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b56b423b6c0eb0725deeabac68d84a8a SHA-1: 8a8330b160d5e6c6ab05dcde115c6835dcc35fb8 SHA-256: 36ba08b02bc1bce615dfa2305d7087de4eb86b8368f8fdb7ffc1e2105329b56d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' and the ML classifier's high confidence score further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://hbphoto.ca/resimler/files/32104815896.pdf
    • http://mu-rrrc.com/userfiles/file/xesuxifajawosokofidi.pdf
    • http://erictex.com/ufiles/files/gatifejeregodinezonotux.pdf
    • http://hondasushi.com/uploads/files/repebom.pdf
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/661232ffd9dde0e8b2664e228c033a7c/xuzokadizib.pdf
    • https://istanajp2.com/contents//files/55923331402.pdf
    • https://jbdclothiers.net/emailer/userfiles/file/4325660473.pdf
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/3a4a788aca18fe182d389b3ec33a443a/8979598906.pdf
    • http://bhttourist.com/upload/fckimagesfile/76008171575.pdf
    • http://hotelsandmartin.cz/files/file/vesusibinovi.pdf
    • http://metapolar.hu/tmp/49432808037.pdf
    • http://candybeauty.vn/upload/files/ledidejoro.pdf
    • https://mvpartners.be/images/uploadedimages/file/95622573718.pdf
    • https://emmaushuis.org/pages/tisubujazo.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/54e99c420a7581fa898c388fe31d69f7/zetozovizazopa.pdf
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/cd639393975e26b07f230bbdd97093b5/gipopogezeresozuva.pdf
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/69nfurrl2vvdtqmc9niahrehq9/lilatibafuso.pdf
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/946408048be45d09bf8ce1ca65a20801/99413975127.pdf
    • http://bet-balance.com/userfiles/file/kisipobibapozifuvezakuj.pdf
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/98e61eacabea119e2d5fe046eb837e58/safunaxel.pdf
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/9cgh3dqbn0r7qno1uigs6830m1/bagisakuvabujob.pdf
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/b5lmth11tf5jk3sogh6tic5nq8/returimibuduk.pdf
    • http://ahcxdq.com/uploads/file/291921265265.pdf
    • http://mp-hd.de/data/aktualnosci_imgs/file/49699789333.pdf
    • http://refpecsbelvaros.hu/kepek/files/51035975587.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=how+to+draw+a+realistic+duckling
    • 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/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e914.bin
df251e22ac58543c9d6a00fdb367eb011ff8458647ce81261d1f25446c444b26
pdf-font-stream PDF embedded font (sfnt) at offset 0xE914 10816 bytes
font_01_sfnt_off000101ee.bin
d2e16f3b9974c6208d3d1ea436fde3362e91862b4d0215ec0742efaaad9ceb42
pdf-font-stream PDF embedded font (sfnt) at offset 0x101EE 16792 bytes
font_02_sfnt_off00012d72.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D72 16792 bytes